Natural monuments around Sainte-Hélène feature a landscape rich in ancient megalithic structures and diverse natural settings. This area is characterized by its historical sites, including impressive dolmens and alignments, alongside serene forests and river views. Visitors can explore a variety of natural monuments that showcase both human history and geological formations. The region offers opportunities to discover unique rock formations and tranquil forest trails.
Last updated: July 2, 2026
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The dolmen stands in the middle of the village, close to a house. It once had a long passage and measured 27 meters in length. The cover plate weighs approximately 40 tons. For a long time, it served as a barn.
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Walking through the woods of Erdeven, one can find among the trees a set of megaliths among which is the one called Caesar's Chair. It owes its name to the occupation of the place by Roman troops in Antiquity, even if Caesar never came here.
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This dolmen would have long served as a stable. It is made up of nine pillars and the covering slab weighs more than 40 tonnes. Access to the dolmen was formerly via a long corridor of 27 meters which no longer exists.
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Hidden in the forest of Saint-Jean, the Kerporel dolmen is a Neolithic structure composed of a massive covering slab in place on three supports. Two other slabs are visible on the ground.
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The Giants of Kerzerho are an alignment of dolmens, the tallest of which measure six meters in height and weigh 40 tonnes. They are aligned perpendicular to the Kerzehro Alignments, located a little further south.
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you have to have some imagination to find Caesar's chair there
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a beautiful dolmen but a pity that there is a house right next to it
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Gigantic dolmen in Crucuno (Erdeven)
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Visitors to Sainte-Hélène particularly appreciate the ancient megalithic sites. Among the most popular are The Giants of Kerzerho, an impressive alignment of dolmens, and the Giant Dolmen of Crucuno, known for its massive 40-ton ceiling slab. Another highly rated spot is Caesar's Chair, a historical rock formation nestled within the woods of Erdeven.
Sainte-Hélène is characterized by a unique blend of ancient megalithic structures and natural landscapes. You'll find impressive dolmens and alignments, serene forests, and natural granite outcrops offering beautiful river views. The area showcases both human history through its archaeological sites and geological formations.
Yes, several natural monuments in Sainte-Hélène are suitable for families. Both Giant Dolmen of Crucuno and The Giants of Kerzerho are categorized as family-friendly, offering engaging historical sites for all ages to explore.
Visitors frequently highlight the historical significance and the tranquil natural settings. Many appreciate the sheer scale of the megalithic structures, such as the 40-ton ceiling slab of the Giant Dolmen of Crucuno, and the unique experience of walking through the ancient alignments at The Giants of Kerzerho. The peaceful forest trails and scenic river views, like those from View of the Blavet from Le Rocher du Diable, are also highly praised.
Absolutely. Sainte-Hélène is renowned for its ancient megalithic heritage. Key sites include Giant Dolmen of Crucuno, a large archaeological site, and Caesar's Chair, a historical rock formation within the woods of Erdeven. The Giants of Kerzerho also represent a significant man-made monument with historical importance.
Yes, the area around Sainte-Hélène offers various trails. For instance, you can explore the Forest Trails Near the Giants of Kerzhéro, which provide beautiful routes for walking. The region's natural monuments are often integrated into longer walking routes, allowing you to combine historical exploration with outdoor activity.
Beyond exploring the monuments themselves, Sainte-Hélène offers a range of outdoor activities. You can find numerous routes for mountain biking, gravel biking, and running. For example, there are MTB trails like the 'Kerlutu Dolmen – Pont Lorois loop' and running trails such as the 'Mané-er-Houët stele loop'. You can find more details on these activities in the MTB Trails around Sainte-Hélène, Gravel biking around Sainte-Hélène, and Running Trails around Sainte-Hélène guides.
Yes, for scenic views, visit View of the Blavet from Le Rocher du Diable. This natural granite outcrop offers particularly beautiful views of the Blavet river, making it a great spot for a break and photography.
The time required varies depending on the monument and your interest. For individual sites like the Giant Dolmen of Crucuno or Caesar's Chair, a short visit of 30 minutes to an hour might suffice. However, exploring alignments like The Giants of Kerzerho or combining visits with nearby forest trails could easily take a few hours or half a day.
Many of the natural monuments are quite accessible, often located near hamlets or within woods with established paths. For example, the Giant Dolmen of Crucuno stands close to a house in the middle of a hamlet. While some forest trails might require a good sense of observation, the main sites are generally reachable for most visitors.
The megalithic structures, such as the dolmens and alignments, are significant archaeological sites that offer a glimpse into ancient human history in the region. They represent impressive feats of engineering from the Neolithic period, with some stones weighing up to 40 tonnes. These sites provide valuable insights into the beliefs and practices of early inhabitants.
Yes, the location of many monuments within natural settings makes it easy to combine your visit with other activities. You can enjoy a walk through the Forest Trails Near the Giants of Kerzhéro, or explore the nearby river views. The region also offers various routes for mountain biking, gravel biking, and running, allowing for a full day of outdoor exploration.


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