Best caves around Naturpark Drei Zinnen - Parco Naturale Tre Cime are primarily historical tunnels and fortifications from World War I, carved into the dramatic Dolomite peaks. This region is characterized by its rugged mountain scenery, where geological formations are largely dolomite. While extensive natural cave systems are limited, the area offers unique underground experiences through these man-made passages. These features provide a glimpse into the strategic positioning and shelter used during the "Mountain War."
Last updated: May 17, 2026
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Entrance or exit. More likely exit of the war tunnel. Entrance is at the foot of the Paternkofel next to the 3 Zinnen hut.
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must have a torch with you!
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one of the most beautiful via ferratas!
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Introduction: Beautiful and not excessively well-known mountain of the Tre Cime di Lavaredo group, which stands alone dominating the Rienza Valley and the Rinbon Valley. From the road that goes up to the Auronzo Refuge, it shows two neighboring horns, not particularly high and covered with pines. During the ascent and on the terrace of the summit, grassy and strewn with pine trees, numerous walkways and trenches dating back to the Great War are evident. Access: Just beyond the Malga (restaurant), reachable by car from the exit of the Tre Cime road following a short dirt road, which descends to the stream and leads to a large parking lot, a mule track branches off to the left and climbs into the woods. Description of the climb: In constant but not particularly steep ascent, you reach the panoramic grassy pass of Forcella de l´Arghena (altitude 2087 m), between the Croda on the left and the Col di Mezzo on the right. Evident remains of trenches, and boundary stone between the Tyrol and the Serenissima Republic. Traversing to the left in the direction of the left elevation, you oblique between the pines on the side of the Croda, to go up a short scree and, continuing on the path, skirt a ridge and move towards the top of the Croda. On the left (tab.) Junction for a short aided ledge, which leads to an interesting war tunnel. Going up still to the right, you pass a short rocky band (not equipped, 10 m of I) and among the pines you reach the wide cap.
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Experience history up close. It gives you goose bumps to see these tunnels and fortifications that have been preserved as memorials.
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The tunnels were driven in the First World War for the war of position between Austrian and Italian mountain hunters in the rock, where the soldiers remained under adverse conditions for months. A tunnel spilled today should have almost led up to the summit of Paternkofel. Since the tunnels sometimes lead upwards through steps in complete darkness, you have no chance, without a headlamp, to even get to the exit next to the large bunker. From there you should carry at least a simple climbing equipment despite being secured by steel cables
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The feeling of the tour with the impressions can not be described in words. Anyway, you feel very small between the mountain giants of the Dolomites.
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The region is primarily known for its historical World War I tunnels and fortifications, which are carved into the dramatic Dolomite peaks. While there are some smaller natural rock formations, extensive natural cave systems are limited due to the dolomite geology. These man-made passages offer a unique glimpse into the area's wartime history.
Many of the underground passages, such as the Patern Galleries and War Trails and the Paternkofel Via Ferrata - De Luca Route, were strategically carved during World War I. They served as vital supply routes, defensive strongholds, and shelters for Austrian and Italian mountain troops during the 'Mountain War,' offering a direct experience of the harsh conditions soldiers endured.
Yes, for many of the historical tunnels, a headlamp or torch is essential, as passages can be long and completely dark. For routes like the Paternkofel Via Ferrata - De Luca Route, even though secured by steel cables, simple climbing equipment is recommended due to the challenging nature of the terrain.
For a less strenuous experience, the Mooser Cave and Trail in the Drei Zinnen Nature Park is a small cave, approximately 5 meters deep, located off the main path of the Anderter Alpe Open-Air Museum. It's part of a beautiful hike and might be more suitable for families compared to the challenging war tunnels.
Many of the war tunnels and associated routes are rated as intermediate to challenging. For instance, the Paternkofel Via Ferrata - De Luca Route involves a challenging climb through historical tunnels. Some passages include steps in complete darkness, requiring good physical condition and appropriate gear.
The primary geological formations in Naturpark Drei Zinnen are dolomite, which creates the rugged mountain scenery. While this contributes to dramatic landscapes, it means the region features more rock formations and man-made tunnels rather than extensive natural subterranean karst systems.
The region offers excellent opportunities for hiking and cycling. You can find various routes, from easy to difficult, around the park. For detailed information on trails, explore the Hiking around Naturpark Drei Zinnen or Cycling around Naturpark Drei Zinnen guides.
The Croda de l'Arghena War Tunnel is part of a beautiful and less excessively well-known mountain route. It features numerous walkways and trenches from the Great War, and a short aided ledge leads to an interesting war tunnel, offering a quieter historical experience.
Visitors frequently highlight the unique opportunity to experience a piece of history firsthand, traversing dark tunnels that served as vital supply routes and defensive strongholds during WWI. The dramatic mountain scenery surrounding these sites also leaves a lasting impression, with many describing the feeling of being 'very small between the mountain giants of the Dolomites'.
While specific seasonal information for cave exploration isn't detailed, the region's mountain activities are generally best enjoyed from late spring through early autumn when weather conditions are more stable and trails are clear of snow. Winter conditions can make access to some higher-altitude tunnels and via ferratas challenging or impossible.
A notable entry or exit point is the Paternkofel War Tunnel Entrance, often found at the foot of Paternkofel, near the Drei Zinnen Hütte. This point provides access to parts of the extensive tunnel systems used during the war.


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