Best natural monuments around Tonardrum offer diverse natural features for exploration. The region's landscape includes ancient forests, limestone formations, and significant geological sites. Visitors can discover a variety of natural monuments, from megalithic structures to waterfalls and caves. These natural landmarks provide opportunities for hiking and experiencing the area's unique terrain.
Last updated: May 2, 2026
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Incredible Stone-Age park, with some technical trails. Massive mythological sacred stones worshipped over centuries, will follow you when adventuring into this unique geological and archaeological forest landscape.
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Stunning limestone caves which you can explore on a guided tour. Well worth a visit. There are 150 steps down to the caves so if you are wearing cleats please be aware, or change into a pair of trainers before you descend down into the natural wonder. There is also a cafe on site. For further details please see https://marblearchcaves.co.uk/
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Marble Arch caves are situated at the picturesque foothills of the Cuilcagh Mountain. They are the longest underground cave system in Northern Ireland (7.1 miles in total) and are said to be the most magnificent in Britain. The caves are regarded as a world-class natural attraction, they are situated in the Cuilcagh Lakelands which is the world's first UNESCO Global Geopark. The caves are only explorable by guided tours which run daily between 10am - 5pm. To secure a spot, visit https://marblearchcaves.co.uk/online-booking-guided-cave-tour/
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Clodagh Glen has a steep sided gorge that is lined by ancient ash trees that cling to the steep sides. The water sculpted river valley has a spectacular arch over the river which formed when the cave roof collapsed. The reserve is known for its limestone gorge, mystical caves and beautiful waterfalls. In the springtime the valley floor is carpeted by bluebells, wood anemones and wild garlic and in the summer silver-washed fritillaries are found besides the path. With a keen eye you may also spot an elusive pint martin and red squirrels!
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The Cuilcagh Mountain Park covers 6,000 acres on the north slopes of the Cuilcagh Mountain. The park was founded in 1998 and works to conserve the bogland and restore damaged peatland. At 665m the mountain is one of the highest points in Ireland. The Limestone rock was formed over 300 million years ago by ocean calcifying organisms when Ireland was covered by shallow tropical sea. With an interesting and varied flora and fauna alongside historic ancient ruins, there is plenty to explore in the park.
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Many of Ireland’s megalithic monuments—portal tombs, court cairns, or wedge tombs such as this one—are known locally as “the giant’s grave.” But this one, on a hilltop in Co. Cavan’s Burren Forest Park, has a giant story to go along with its name. According to Harold Johnson, from the nearby town of Blacklion, the giant, attempting to impress a lady, failed in his final attempt to jump the nearby chasm, which is, of course, called “The Giant’s Leap.” Harold Johnson relates this story in some detail, while seated on the Giant’s Grave, in the video, below right. Mr. Johnson also was our guide, and provided the narration, for our feature on the Killinagh Cursing Stones, located on the opposite side of the town of Blacklion. (https://voicesfromthedawn.com/burren-giants-grave/)
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Around Tonardrum, you can explore a variety of natural monuments, including ancient forests, significant geological sites, limestone formations, and historical sites featuring megalithic structures. These include dramatic geological features, waterfalls, and mystical caves.
Yes, Tonardrum is rich in historical natural monuments. You can visit Giant's Grave & Giant's Cave, a site with megalithic tombs in the Burren Forest, and Cavan Burren Park Megalithic Stones, an ancient park with significant Stone-Age structures set within a unique geological landscape.
For waterfalls and caves, Cladagh Glen Waterfall is a must-see. This nature reserve features a steep-sided gorge, ancient ash trees, a limestone gorge, mystical caves, and beautiful waterfalls. Another notable spot is Pollnagollum Cave and Waterfall, known for its complex cave system fed by a tumbling waterfall.
For expansive views, head to the Cliff Edge of Cuilcagh Mountain. This natural monument offers far-reaching views from one of Ireland's highest points, within the Cuilcagh Mountain Park.
Yes, there are several easy hiking trails available. You can find routes like the 'Belmore Forest loop via Pollnagollum Cave' or 'Marble Arch Caves via Cladagh River'. For more options, explore the Easy hikes around Tonardrum guide.
Tonardrum's natural monuments showcase diverse geological features. The region is known for its limestone formations, such as those found at Cladagh Glen Waterfall with its limestone gorge, and the ancient limestone rock of Cuilcagh Mountain, formed over 300 million years ago.
Absolutely. The area offers various running trails. Consider the 'Florence Court Red Trail' or the 'Cuilcagh Mountain Park running loop'. More running options can be found in the Running Trails around Tonardrum guide.
Yes, road cycling is a popular activity. Routes like 'Bundoran to Lower Lough Erne loop from Blacklion' or 'Florence Court – Florence Court loop from Drumlaghy' are available. For a comprehensive list, check the Road Cycling Routes around Tonardrum guide.
Visitors appreciate the unique blend of natural beauty and historical significance. The megalithic tombs at Giant's Grave & Giant's Cave, with their local legends, and the 'incredible Stone-Age park' at Cavan Burren Park Megalithic Stones are often highlighted. The mystical caves and beautiful waterfalls of Cladagh Glen Waterfall also receive high praise.
The trails vary in difficulty. While some, like those around Cavan Burren Park Megalithic Stones, are described as 'technical', there are also many 'easy' graded routes available, such as the 'Tullygobban Tomb – Giant's Grave & Giant's Cave loop'. It's advisable to check specific route details for difficulty.
The natural monuments, particularly areas like Cladagh Glen Waterfall, are home to diverse flora and fauna. In spring, the valley floor is carpeted with bluebells, wood anemones, and wild garlic. Keep an eye out for silver-washed fritillaries in summer, and elusive pine martens and red squirrels.
While some areas like Cuilcagh Mountain Park have networks of trails, it's often recommended to park your bike and explore on foot to fully appreciate the diverse flora, fauna, and historic ruins. However, there are dedicated road cycling routes in the wider Tonardrum area if you prefer to cycle.


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