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Belluno

Top 20 Caves in Belluno

Best caves in Belluno are found within the Dolomites, offering a range of subterranean experiences. The region features diverse geological formations, from karst sinkholes to natural grottoes and historical war tunnels. These sites provide insights into both natural processes and human history. Belluno's caves present varied exploration opportunities for visitors.

Best caves in Belluno

  • The most popular caves include Lagazuoi Tunnels, a cave that was created by Italian soldiers during World War I and is now open to visitors. This route is equipped with ropes and equipment to guide you through the dark, rocky terrain.
  • Another must-see spot is Kaiserjägersteig Trail, a trail that was used as a connection road during the First World War to transport food, raw materials, and weapons. It features tunnels that can be explored with a headlamp.
  • Visitors also love Bus de la Lum Sinkhole, a cave that was the scene of a tragic event during the Second World War. It was formed by karst, the dissolution of rock by water.
  • Belluno is known for historically significant sinkholes, natural grottoes, and war tunnels. These include sites with paleontological findings and unique geological formations.
  • The caves in Belluno are appreciated by the komoot community, with more than 190 upvotes and over 240 photos shared across 36 highlights.

Last updated: April 29, 2026

Kaiserjägersteig Trail

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During the "Big War" was used as connection road to transport food, raw materials as well as weapons and ammunitions.

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Bus de la Lum Sinkhole

Highlight • Cave

The Bus de la Lum was the scene of a tragic event, the historicity of which is disputed and at the center of a bitter controversy.

During the Second World War, the cesspool was used by partisans (the resistance was particularly active in the Cansiglio area) to dump the bodies of several soldiers of the Italian Social Republic and German soldiers, as well as civilians. Burial in natural caves has led some sources to compare this event to the Venezia Giulia (the Foibe) massacres.

According to the association Silentes Loquimur, created specifically to commemorate the victims of the Bus de La Lum, a 1949 report by the Carabinieri of Vittorio Veneto counted over 300 victims, while the speleologists of the Italian Cave Rescue Center were working on theirs Investigations in the 1960s assumed up to 500 victims (200 German soldiers, 100 RSI soldiers, 200 civilians). The same association reports that in the early 1950s the remains of 26 people were recovered, while a search carried out in 1992 turned up another 68 people who were later buried in the Caneva cemetery. No further surgeries have been performed since then due to the high economic cost.

According to Umberto Lorenzoni, president of the Treviso ANPI, "no more than a dozen skeletons were recovered" from the Bus de la Lum; and when, in the early 1990s, the president of the ANPI of Pordenone, Bruno Giust, asked for further investigations to be opened, "we were told by the president of the Victims' Association that it was not appropriate to proceed. Obviously because, in our opinion, there was nothing else to be found gave". He concluded that the Bus de La Lum was used as an improvised burial ground in the final months of the war, at a time "when nothing else could be made available".

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Lagazuoi Tunnels and World War I Trenches

Highlight • Historical Site

Do not forget helmet and (forehead) lamp ;-)
Descend better in the tunnel and choose a different route for ascent over the (quite simple) via ferrata

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Cengia Martini World War I Outpost

Highlight • Historical Site

I can't imagine how the soldiers of both sides could fight here.

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Goiginger Tunnel

Highlight (Segment) • Cave

In the course of the war, the Hexenstein was littered with caves and crossed by a tunnel: The Goiginger tunnel, named after Field Marshal Ludwig von Goiginger, who ordered the construction of this tunnel. This tunnel can be visited with a short and hardly strenuous hike. With the right equipment, the inspection is also possible on rainy days. The tunnel crosses almost the entire east wall of the Hexenstein horizontally. The entrance is on the slope above the path that leads along the foot of the Hexenstein. The entrance is a bit narrow, but then the full length of the tunnel, approx. 500 meters, is accessible while standing.
Some sections of the tunnel are pitch dark, the darkness is occasionally interrupted by a series of identical windows that open onto the mountainside. In the tunnel you can see the remains of a generator base and the supports of the electrical line.
If you continue from the tunnel exit towards the summit, you will reach the saddle and the tip of the Hexenstein, i.e. the Goiginger position.
Here you can see the remains of the Austrian bolt position with a system of trenches and trenches, remains of buildings and barracks, caves, material stores and kitchens.
Source: lagazuoi.it/DE/percorso27-Der-GoigingerStollen

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Forte Monte Ricco

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The Forte di Monte Ricco, restored and reopened to the public in 2017, often hosts exhibitions and classical music concerts. However, it is advisable to call before visiting to check the opening of the main part. During a summer visit, in fact, it was found that access was allowed only by reservation. An entrance ticket is required but inexpensive. The Fort offers the possibility to walk around the front and internal perimeter, allowing appreciation of the pre-Roman structure. Protected by a moat and a drawbridge, the site also offers a panoramic view of Monte Cristallo.

The Fort was built in the pre-Roman era with a defensive function, maintained also in Roman and medieval times. Before the year 1000, it was the seat of an important castle represented in the coat of arms of Cadore. From 1420 it became the seat of the Captain of Venice, but declined in the 17th century. During the Kingdom of Italy, two fortifications were built as part of the defensive system against Austria-Hungary. During the First World War, the Fort was relegated to a warehouse and logistics. Abandoned after 1918, restoration began in 2007 on the initiative of the Municipality of Pieve di Cadore, concluding in 2017.

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Grotta dell'acqua nera

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The large entrance hall of this cave conceals a deep, dark mouth, filled by an underground stream that is always well-fed, even in dry periods. This is the entrance—reserved for cave divers—to a vast and intricate network of cavities deep within the mountain. The water is actually clear, and it is thought that the name derives from the dark moss-covered floor, over which the stream flows before flowing into the Senaiga.

Due to the cave's complex morphology and technical difficulties, exploration began only in the 1970s, and so far, cave divers have discovered a 1,600-meter stretch of siphons and difficult passages. In the 1930s, dye injections proved that this cave communicates with the Castello Tesino Caves, a few kilometers away. Furthermore, an examination of the fine sand found inside, rich in granite crystals, testifies to a significant contribution of water coming from the Cima d'Asta group, much higher and much more distant!

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Lagazuoi Tunnels

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The Lagazuoi Tunnels were created by Italian soldiers during World War I and are now open to visitors. Classified as a beginner via ferrata (Via Ferrata Galleria del Piccolo Lagazuoi), the route is fully equipped with ropes and equipment to guide you through the dark, rocky terrain.

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World War I Trenches and Tunnels on Sas de Stria

Highlight (Segment) • Historical Site

Interesting relics from WWI

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Bus de la Bela

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In this deep cave, which can be visited in part, remains of Ursus spalaeus (Cave Bear), a large mammal that existed during the middle and late Pleistocene, were found.

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Davide Fioraso
March 27, 2026, Forte Monte Ricco

Built in the last two decades of the 19th century, under the Kingdom of Italy, the Forte di Monte Ricco constituted the heart of the entrenched camp of Pieve di Cadore. It was conceived and built to interdict enemy approaches from the Tre Ponti narrows towards Pieve and Tai along the Piave valley and to act in close synergy with the nearby Batteria Castello, about 200 meters away, as well as with the various artillery positions on the overlying heights, on Monte Tranego, Monte Zucco, Col Vidà. Monte Ricco was probably the site of a prehistoric settlement, then of the castle of Cadore. Abandoned until 2007, it has undergone demanding restoration, consolidation, and enhancement works. Reopened to the public in 2017, it hosts exhibitions or classical music concerts. https://www.tizianovecellio.it/luoghi/il-forte-di-monte-ricco/

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Wonderful panoramic viewpoint overlooking the Falzarego Pass.

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The name probably derives from "lume" or flame, due to the luminescence that would have been seen on summer nights above the cavity, produced by the gases generated by the putrefaction of animal carcasses thrown into the well. The cavity was formed by karst, or by the dissolution of the rock by water. According to legend, it is inhabited by the Anguane, very ugly fairies, with nails instead of hair, and long fangs instead of teeth. During the day they went to wash clothes at Lake Santa Croce, then wandered around in search of wood, food and children to roast. At night, they lit a small fire, whose light, spotted by shepherds, gives the cavity its name

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The large entrance hall of this cave conceals a deep, dark mouth, filled by an underground stream that is always well-fed, even in dry periods. This is the entrance—reserved for cave divers—to a vast and intricate network of cavities deep within the mountain. The water is actually clear, and it is thought that the name derives from the dark moss-covered floor, over which the stream flows before flowing into the Senaiga. Due to the cave's complex morphology and technical difficulties, exploration began only in the 1970s, and so far, cave divers have discovered a 1,600-meter stretch of siphons and difficult passages. In the 1930s, dye injections proved that this cave communicates with the Castello Tesino Caves, a few kilometers away. Furthermore, an examination of the fine sand found inside, rich in granite crystals, testifies to a significant contribution of water coming from the Cima d'Asta group, much higher and much more distant!

Translated by Google

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A. 🐺
November 1, 2024, Bus de la Bela

This large cave has various names: Bus de la Bela, Bus de la Vecia, Bus de la Tosa, Grotta di San Donato, and Grotta dell'Orso. The skeleton of an Ursus Spalaeus (Cave Bear) was found there, a prehistoric animal of imposing size that surpassed that of today's grizzly bear: 3.5 meters (standing) and weighing almost 1 ton. Three explanatory panels at the entrance tell its story. The skeleton is visible free of charge at the Lamon Town Hall. The remains of this mammal have been found in numerous caves across Europe, an environment they used as a dwelling and for hibernation. They often competed with prehistoric humans for ownership of the cave, and one theory suggests they became extinct precisely because of predation by our ancestors. In ancient times, the bones found were attributed to dragons or griffins! Opposite the cave, climbing a short, exposed ramp equipped with a cable leads to a beautiful waterfall. https://it.wikipedia.org/wiki/Ursus_spelaeus

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A via ferrata set is not absolutely necessary, but a headlamp or flashlight is a must. A helmet can't hurt either 😉

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The Lagazuoi Tunnels were created by Italian soldiers during World War I and are now open to visitors. Classified as a beginner via ferrata (Via Ferrata Galleria del Piccolo Lagazuoi), the route is fully equipped with ropes and equipment to guide you through the dark, rocky terrain.

Translated by Google

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The Forte di Monte Ricco, restored and reopened to the public in 2017, often hosts exhibitions and classical music concerts. However, it is advisable to call before visiting to check the opening of the main part. During a summer visit, in fact, it was found that access was allowed only by reservation. An entrance ticket is required but inexpensive. The Fort offers the possibility to walk around the front and internal perimeter, allowing appreciation of the pre-Roman structure. Protected by a moat and a drawbridge, the site also offers a panoramic view of Monte Cristallo. The Fort was built in the pre-Roman era with a defensive function, maintained also in Roman and medieval times. Before the year 1000, it was the seat of an important castle represented in the coat of arms of Cadore. From 1420 it became the seat of the Captain of Venice, but declined in the 17th century. During the Kingdom of Italy, two fortifications were built as part of the defensive system against Austria-Hungary. During the First World War, the Fort was relegated to a warehouse and logistics. Abandoned after 1918, restoration began in 2007 on the initiative of the Municipality of Pieve di Cadore, concluding in 2017.

Translated by Google

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Frequently Asked Questions

What are some of the most historically significant caves in Belluno?

Belluno's caves offer deep historical insights. The Lagazuoi Tunnels were created by Italian soldiers during World War I and are now open to visitors, equipped with ropes and gear. Similarly, the Kaiserjägersteig Trail features tunnels that were vital connection roads during the First World War. The Bus de la Lum Sinkhole also holds a tragic history from the Second World War.

Are there caves in Belluno with unique geological formations?

Yes, the region boasts unique geological features. The Grotta di Tofana, located in the Tofane group, is notable as one of the few natural caves formed in dolomite rock rather than typical limestone. It extends approximately 300 meters deep with a roof up to 10 meters high.

Which caves in Belluno are suitable for experienced adventurers or require special equipment?

For those seeking a challenge, the Grotta di Tofana is accessible via a via ferrata. The Lagazuoi Tunnels are classified as a beginner via ferrata and require a headlamp or flashlight, with a helmet also recommended. The Grotta dell'acqua nera, with its intricate network of underwater cavities, is reserved for experienced cave divers.

Can I find caves in Belluno that offer insights into prehistoric life?

Yes, the Bus de la Bela is particularly interesting for its paleontological significance. Remains of Ursus spalaeus (Cave Bear), a large mammal from the Pleistocene epoch, have been discovered there, offering a glimpse into ancient ecosystems.

What is the best time of year to visit caves in Belluno?

For caves like the Grotta Azzurra, visiting in late spring or early fall is recommended to enjoy the views more tranquilly and appreciate its turquoise waters. Generally, these periods offer pleasant weather for exploring the surrounding areas as well.

Are there any family-friendly cave experiences in Belluno?

While many caves in Belluno can be challenging, the Old Road of the Cismon Gorge offers a route that includes a cave section and is considered family-friendly, providing a suggestive experience along a deep gorge.

What kind of unique natural phenomena can be found in Belluno's caves?

The Grotta Azzurra, located in Borgo Valbelluna, is famous for its stunning turquoise-colored, crystal-clear water, creating a 'small corner of paradise.' The Bus del Buson is another natural spectacle, a fossil canyon carved by water in the Ardo valley.

What outdoor activities can I do near the caves in Belluno?

The Belluno region, home to these caves, is excellent for various outdoor activities. You can find numerous Mountain Hikes, including challenging routes like the 'Lagazuoi Hut – Entrance to the Kaiserjäger Path loop'. There are also extensive MTB Trails and Road Cycling Routes throughout the Dolomites.

Are there any caves in Belluno related to World War I military history beyond the Lagazuoi Tunnels?

Yes, the Goiginger Tunnel on the Hexenstein is another significant World War I site. Named after Field Marshal Ludwig von Goiginger, this 500-meter tunnel crosses almost the entire east wall of the Hexenstein horizontally and can be explored with the right equipment.

What should I know about the Grotta dell'acqua nera?

The Grotta dell'acqua nera features a large entrance hall leading to a deep, dark opening. An underground stream flows into an intricate network of underwater cavities, making it a site primarily for experienced cave divers. Its name, meaning 'black water,' likely comes from the dark, moss-covered floor over which the clear stream flows.

What do visitors enjoy most about exploring the caves in Belluno?

Visitors appreciate the diverse experiences offered by Belluno's caves, from the historical significance of the World War I tunnels to the unique geological formations and paleontological findings. The opportunity to combine cave exploration with hiking and other outdoor activities in the stunning Dolomites is also a major draw.

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