Best natural monuments around Slievenagravery include areas recognized for their ecological significance, featuring diverse grassland types and rich floral diversity. This region, part of the wider Belfast Hills, hosts a variety of herbaceous plants and transitions to wet heath vegetation at higher elevations. It is notable for its concentration of unimproved grassland, a habitat supporting rare species such as specific orchid types and the marsh fritillary butterfly. The landscape offers opportunities to observe unique ecological features and significant natural formations.
…Last updated: July 13, 2026
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The facility is of impressive size.
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The structure consists of a circular earthen ring with a diameter of 180 m and an area of 28,000 square meters, surrounded by an earthen rampart 3.5 m high. At least three of the five irregularly distributed gaps in the ring are intentional and possibly original. East of the center of the ring is a small passage grave with a westward-facing entrance.
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The park covers almost 130 hectares and offers a variety of landscapes - from wide meadows and shady woodlands to manicured rose and Japanese gardens. The International Rose Trials, which take place here every year, are particularly exciting. If you come at the right time, you can admire an impressive variety of roses, which are judged by international experts. But the park has a lot to offer away from the roses in bloom: whether you just want to take a quiet walk in the Walled Garden, explore the Japanese Garden or challenge yourself on the orienteering course - everyone will find a favorite spot here. A small café provides refreshments and the playground also has something for younger visitors. The park has many hidden corners that make it an ideal stop to recharge.
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As you get closer, the mystical aura of the place unfolds, with its mighty, almost circular earthen wall, which measures over 180 meters in diameter and dominates the view over the surrounding plateau. This ancient henge complex is one of the largest and best-preserved monuments of its kind in Ireland - hard to miss when you get close to Shaw's Bridge. In the center of the ring, a megalithic tomb awaits you, which tells its own story with its five supporting stones and a mighty capstone. You can literally feel the thousands of years that have passed here since ceremonies and gatherings probably took place at this place. It is impressive how the Giant's Ring has survived over time, while the wooden structures of the Ballynahatty settlements are long gone.
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Super beautiful cave, but watch out for falling rocks
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With thousands of colourful flowers and plant species from around the world, the Botanic Gardens are a wonderful place to visit. The gardens opened in 1828 as a private park and welcomed the public from 1895. Belfast's beautiful Palm House conservatory pre-date the glasshouses of Kew Gardens. Its domed roof has allowed plants to grow especially tall, such as a 36-foot (11 m) lily.
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With thousands of colourful flowers and plant species from around the world, the Botanic Gardens are a wonderful place to visit. The gardens opened in 1828 as a private park and welcomed the public from 1895. Belfast's beautiful Palm House conservatory pre-date the glasshouses of Kew Gardens. It's domed roof has allowed plants to grow especially tall, such as a 36-foot (11 m) lily.
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The area, particularly Slievenacloy, is an Area of Special Scientific Interest (ASSI) known for its exceptional biodiversity. You can explore diverse grassland types, including species-rich vegetation with plants like Devil's-bit scabious and various sedges. Higher elevations feature wet heath vegetation with heather and Sphagnum bog mosses. It's also a habitat for at least seven species of orchid and the marsh fritillary butterfly.
Yes, several natural monuments are suitable for families. Sir Thomas and Lady Dixon Park Rose Garden and Stone Monoliths offers diverse landscapes, including woodlands, rose gardens, meadows, and a playground. The Belfast Botanic Gardens are also very family-friendly, featuring thousands of colorful flowers, plant species, and the impressive Palm House conservatory.
For stunning panoramic views, Cave Hill is highly recommended. From McArt's Fort on Cave Hill, you can enjoy sensational views across the city of Belfast and out to the Belfast Lough and the Irish Sea. Divis and the Black Mountain also offer expansive views across the north from their summits.
There are various hiking trails to explore. For example, you can find moderate hikes like the 'Divis and the Black Mountain loop' or 'Divis and the Black Mountain – Black Mountain Summit loop'. If you're looking for easier options, consider 'Mila's Lake loop' or 'View from Black Mountain – View from Divis Mountain loop'. You can find more details on these and other routes in the Hiking around Slievenagravery guide.
Absolutely. The area offers opportunities for both mountain biking and road cycling. For mountain biking, trails like the 'Divis & Black Mountain loop' or 'Cave Hill Country Park Trail' are popular. Road cyclists can enjoy routes such as the 'Lagan Towpath – Bartin's Bay loop' or 'Scarva Village – Redhill Climb loop'. Explore more options in the MTB Trails around Slievenagravery and Road Cycling Routes around Slievenagravery guides.
The geology of the area, particularly around the Belfast Hills, is characterized by basalt cliffs, as seen at Cave Hill. The Cave Hill Cave formations are located within some of the largest and highest granite outcrops in the region. Divis and the Black Mountain are also notable for their dark basalt bedrock.
Yes, some locations offer facilities. Sir Thomas and Lady Dixon Park has a small café for refreshments. The Belfast Botanic Gardens also provide facilities for visitors.
Slievenacloy is crucial for conservation due to its significant concentration of unimproved grassland, a rare habitat in Northern Ireland. It supports a remarkable array of flora, including numerous herbaceous plants and at least seven orchid species. It's also a vital breeding ground for the marsh fritillary butterfly, whose larval food plant, Devil's-bit scabious, thrives here.
Visitors frequently highlight the breathtaking views, especially from spots like Cave Hill, where they can spot 'Napoleon's Nose' and enjoy vistas across Belfast. The diverse landscapes of parks like Sir Thomas and Lady Dixon Park, with its award-winning rose gardens and tranquil corners, are also highly appreciated. The unique ecological richness and the chance to see rare flora and fauna are also significant draws.
Slievenacloy, as an Area of Special Scientific Interest, is generally accessible for nature enthusiasts. While specific accessibility details for all trails might vary, the focus is on preserving its natural state. For more universally accessible options, the Belfast Botanic Gardens are noted as wheelchair accessible.
The best time to visit largely depends on your interests. For enjoying the rich floral diversity, late spring and summer (May to August) are ideal when many herbaceous plants, including orchids, are in bloom. If you're interested in the International Rose Trials at Sir Thomas and Lady Dixon Park, check their schedule, as they typically occur in summer. For hiking, milder weather in spring and autumn can be very pleasant.
Many outdoor areas in the region are dog-friendly, especially on trails and in parks, though specific rules may apply to certain protected natural monuments or gardens. It's generally advisable to keep dogs on a leash to protect local wildlife and ensure a pleasant experience for all visitors. Always check local signage for specific regulations at each site.


Extend your search for the best caves by checking out these guides of the top ones around Slievenagravery: