Best natural monuments in Cavan showcase its diverse geological history and natural beauty. The region, often referred to as "The Lake County," features ancient limestone formations, serene waterways, and lush forests. These sites offer a blend of natural beauty and historical intrigue, providing opportunities for outdoor activities. Cavan's landscape is characterized by unique geological features, including ancient megalithic structures and glacial erratics.
Last updated: April 28, 2026
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Hiking in Cavan
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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Wind swept bog mountain trails along the wind turbines dotted along the ridge and border with NI. The Slieve Rushen mountains are a geological park. This unique landscape was created when the icecaps melted.
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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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In the Burren Forest you can admire a few megalithic tombs, the so-called Giant's Graves. According to an Irish legend, two giants vied for a pretty giantess and jumped daringly over a ravine - until one fell into the ravine and the stone walls collapsed above him. This is how the Giant's Grave was created.
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The holy well at Raffony is still highly venerated, locals still visit here on the 1st February, St Brigid's day. The semi-circular, stone-built, well house is situated inside an enclosure surrounded by a hedge. A short walk from the gate leads to a small paved area in front of the well. Each of the three large stones lying on top of the well house bears an inscribed cross. The site is very well maintained, I was expecting to see a lot more votive offerings at the well, as we visited shortly after St Brigid's day. The enclosure is located on the north side of the road, just beyond the old Church
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Cavan is rich in geological wonders. You can explore the ancient limestone formations, glacial erratics, and fossils at Cavan Burren Park Megalithic Stones, which is part of the larger Cuilcagh Lakelands Geopark. The Geopark also features the stunning Marble Arch Caves with their impressive stalactites, stalagmites, and underground rivers. Additionally, Slieve Rushen offers a windswept bog mountain landscape shaped by melting ice caps.
Yes, Cavan's natural monuments often intertwine with ancient history. Giant's Grave & Giant's Cave features ancient megalithic tombs, with local legends of giants. Cavan Burren Park Megalithic Stones is an ancient Stone-Age park with various prehistoric monuments like Portal Tombs and the Calf House Dolmen. You can also find the ruins of Cloughoughter Castle on an island in Lough Oughter, adding a historical dimension to the natural beauty.
For family outings, St Brigid's Well, Raffony is listed as family-friendly. Killykeen Forest Park offers easy-to-follow signposted walks along Lough Oughter, perfect for picnicking, cycling, and experiencing the lake network. Dún na Rí Forest Park also provides a peaceful escape with opportunities for leisurely strolls amidst lush woodlands, suitable for families.
Cavan offers a variety of outdoor activities. You can enjoy hiking on the 'Stairway to Heaven' boardwalk at Cuilcagh Mountain within the Marble Arch Caves Global Geopark, or explore the trails at Slieve Rushen. For cycling, Killykeen Forest Park has family-friendly trails. You can also find numerous routes for mountain biking, hiking, and touring bicycles in the region. For more details, check out the guides for MTB Trails in Cavan, Easy hikes in Cavan, and Cycling in Cavan.
Yes, many natural monuments in Cavan feature excellent hiking opportunities. Cavan Burren Park Megalithic Stones offers diverse walking trails, including the Interpretive Loop and Boulder Trail. Cuilcagh Mountain, part of the Marble Arch Caves Global Geopark, is home to the popular 'Stairway to Heaven' boardwalk. Killykeen Forest Park provides easy walks along Lough Oughter, and Slieve Rushen has windswept bog mountain trails. For easy hikes, consider routes like the Deerpark Forest loop from Virginia or the Bailieborough Castle Lake Loop, as detailed in the Easy hikes in Cavan guide.
The Shannon Pot is traditionally recognized as the surface source of the River Shannon, Ireland's longest river. Located on the slopes of Cuilcagh Mountain within the Marble Arch Caves Global Geopark, it appears as a deep, circular pool fed by underground water flowing through limestone caves. It offers a unique opportunity to witness the origin of a major Irish waterway.
Yes, Tullydermot Waterfalls in north Cavan are renowned for their exceptional beauty. They cascade down rocky cliffs, surrounded by lush greenery and tranquil trails. It's a picturesque spot for leisurely hikes, peaceful picnics, and photography.
Cavan, known as 'The Lake County,' offers diverse natural landscapes. You'll find ancient limestone formations and relict prehistoric landscapes at Cavan Burren Park Megalithic Stones, serene waterways and extensive lake networks like Lough Oughter, and lush forests such as Killykeen Forest Park and Dún na Rí Forest Park. The region also features windswept bog mountains like Slieve Rushen, showcasing unique geological formations from melting ice caps.
Visitors particularly enjoy the blend of ancient history and stunning geological formations. The ancient megalithic tombs at Giant's Grave & Giant's Cave and the unique geological and archaeological features of Cavan Burren Park Megalithic Stones are highly appreciated. The peaceful escape offered by the forest parks and the distinct scenery of bog mountains like Slieve Rushen also receive positive feedback from the komoot community.
While many sites are well-known, the sheer diversity of Cavan's landscape means there are always new discoveries. The tranquil setting of Tullydermot Waterfalls, with its cascading beauty and peaceful trails, could be considered a hidden gem for those seeking serenity. Exploring the lesser-known trails within the larger forest parks like Killykeen or Dún na Rí can also lead to unique and quiet experiences away from the main paths.
The best time to visit Cavan's natural monuments generally depends on your preferred activities. Spring and summer (April to September) offer milder weather, longer daylight hours, and lush greenery, which are ideal for hiking, cycling, and exploring the outdoor sites like Cavan Burren Park and the forest parks. Autumn provides beautiful foliage, while winter can offer a stark, windswept beauty, especially on sites like Slieve Rushen, though some facilities or trails might have reduced accessibility.


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