Natural monuments around Trédrez-Locquémeau showcase a diverse coastal landscape in Brittany, characterized by its unique geological formations and natural habitats. This picturesque area features impressive cliffs, rocky promontories, and significant ecological sites. The region offers various natural features for exploration, from ancient megaliths to protected wildlife areas.
Last updated: July 4, 2026
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The roof table measures 5.75 m long, 3.55 m wide and 0.75 m thick. The orthostat on the north side measures 2 m high, 1.50 m wide and 0.20 m thick. It continues to the west with a dry stone wall which does not appear to be original. The orthostat on the west side is slightly domed. It measures 2.55 m wide by 2.305 m high with a thickness between 0.40 m at the base and 0.30 m at the top. The southern orthostat is backed by the slope. It measures 2.50 m wide, 2.40 m high and 0.35 m thick. The internal chamber measures 5 m long by 3 m wide with a height under the slab of 2 m
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If you pass by it's quite nice, but it's not worth making the extra trip!
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This Neolithic covered gallery tomb on Milliau Island measures 9.3 meters long and is constructed from distinctive pink granite quarried from Ploumanac'h. The monument features ten standing stones on the north side and five on the south, originally covered by five granite slabs, though only three remain in position today. The structure's current open-ended design makes it unclear whether it functioned as a covered walkway or a side-entrance burial chamber.
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A small turtle-shaped uninhabited granite island located approximately 400 meters west of Pointe de Bihits near Trébeurden on Brittany's Pink Granite Coast. The rocky outcrop forms part of a protected natural area of ecological, wildlife, and botanical interest alongside the nearby Pointe de Bihit
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A large, a really large stone slab as a cover – I was really astonished. Here is the translation of the information panel: The stone monuments of Kerguntuil are remains from the late Neolithic period (around 2000 BC). The passage grave, consisting of several stone slabs, and the dolmen are two very fine examples of megaliths (assemblies of large stones) erected in Western Europe during this period. Did you know that these passages were rediscovered in the 1930s thanks to the dedication of local volunteers who excavated and restored the monument? It is very likely that our ancestors used these monuments as collective burial sites. Today, these remains bear witness to the architectural genius of these prehistoric people, but also to their worldview. Look at the engravings inside, on the pillars of the mound foundation burial: These pairs of raised protrusions, engraved in relief, are said to represent breasts and the Great Mother Goddess of the Neolithic period.
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The building of the old quarry now houses a bird protection center run by the LPO organization, comparable to the BUND in Germany. There is a lot of information and also a television screen that constantly shows current images of a colony of "Fou de Basse" - "Northern Gannets" on one of the "Seven Islands". This means that the animals can be observed without being disturbed. The protection center for injured or oil-contaminated animals is not open to the public.
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Nice vestige on Milliau Island.
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The dolmen and the covered alley of Kergüntuil (or Kergünteil) are two megalithic buildings separated by a hundred meters located in the town of Trégastel. The dolmen consists of three orthostats and a cover table. It is difficult to characterize its architecture because the building served as a dwelling then as a stable. It is backed by an embankment which perhaps corresponds to the remains of the original tumulus.
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The region boasts a diverse coastal landscape. You can explore the impressive Turtle Rock, a small, turtle-shaped granite island, or the dramatic Cliffs of Trédrez, which stretch for kilometers and offer breathtaking panoramic views. The Pointe de Dourven also features granite chaos and diverse wild vegetation.
Yes, the area is rich in history. You can visit the Kerguntuil Megaliths, an archaeological site with a passage grave and dolmen from the late Neolithic period. Another significant site is the Allée Couverte of Île Grande, a covered granite path dating back approximately 5000 years. Additionally, Milliau Island Covered Gallery is a Neolithic tomb constructed from pink granite, accessible at low tide.
The Lagune du Vorlenn, located at the Pointe de Séhar, is a vital ecological site and sanctuary for migratory birds and rare flora. The area around Turtle Rock is also a protected natural area of ecological, wildlife, and botanical interest.
The Cliffs of Trédrez are traversed by the Sentier des Douaniers (customs officers' path), offering stunning views. You can find various hiking routes, such as the 'Trédrez Cliffs Circuit' or 'Beg an Nerv – Beg ar Forn loop from Étang du Vorlen'. For more options, explore the Hiking around Trédrez-Locquémeau guide.
Yes, several natural monuments are suitable for families. The Kerguntuil Megaliths and the Allée Couverte of Île Grande are both listed as family-friendly. The LPO Bird Protection Center Les Sept-Îles also offers an educational experience for all ages.
The coastal natural monuments are beautiful year-round. However, for hiking and enjoying the outdoors, spring and autumn offer pleasant temperatures. Visiting during low tide is essential for accessing sites like Île Milliau and exploring the base of the Cliffs of Trédrez.
Île Milliau is accessible on foot at low tide via a causeway from Trébeurden. It's a 23-hectare island with a rich history, including a Neolithic covered alley. The highest point, Penn Milieo (52m), offers a stunning 360-degree panoramic view, perfect for picnics. Suitable times for access are usually posted at the harbor in Trébeurden.
Visitors frequently highlight the impressive scale of the ancient structures, such as the large stone slabs at the Kerguntuil Megaliths. The unique shapes of natural formations like Turtle Rock and the breathtaking coastal views from places like the Cliffs of Trédrez are also highly appreciated.
Yes, the region offers various cycling opportunities. You can find routes like the 'Pink Granite Coast MTB Loop' or 'Lannion – Saint-Efflam Beach loop from Trédrez-Locquémeau'. For more detailed information, refer to the Gravel biking around Trédrez-Locquémeau guide or the MTB Trails around Trédrez-Locquémeau guide.
Pointe de Dourven is a rocky promontory marking the southern entrance to the Léguer estuary, offering expansive views of the Bay of Lannion. It's known for its granite chaos, dramatic cliffs, and diverse wild vegetation. Historically, it served as a fortified outpost and surveillance point, with remnants like a guardhouse still visible.
The LPO Bird Protection Center Les Sept-Îles, housed in an old quarry building, provides a lot of information about local birdlife. It features screens showing live images of a Northern Gannet colony, allowing observation without disturbance.


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