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Arzon

Top 20 Natural Monuments around Arzon

Natural monuments around Arzon, situated on Brittany's Rhuys peninsula, feature a unique combination of ancient human history and coastal landscapes. The area is characterized by its picturesque settings, including the Gulf of Morbihan, and offers insights into prehistoric life. These sites provide opportunities to explore significant historical structures integrated into the natural environment.

Best natural monuments around Arzon

  • The most popular natural monument is Dolmen des Pierres Plates, a historical site located directly by the sea. This dolmen features…

Last updated: June 20, 2026

Dolmen des Pierres Plates

Highlight • Historical Site

The dolmens here in Locmariaquer fascinated me a lot, a reason to come back here.

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The Duer ornithological reserve is an old salt pan now inhabited by tens of thousands of birds. From the two hides installed occasionally, it is possible to observe specimens throughout …

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Bilgroix Point

Highlight • Viewpoint

Here you can observe the strong tidal flow in the Gulf of Morbihan.

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Butte de César

Highlight • Historical Site

Caesar's Mound is a tumulus 56 meters in diameter and 18 meters high. This pile of stones, covered with a layer of silt and black earth, was explored in 1853. …

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Pointe de Brouel

Highlight • Viewpoint

Pointe de Brouel is the westernmost part of the Island of Arz (Morbihan).

This similarity in name with the nearby Pointe de Brouel on Île aux Moines originated four thousand …

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Tips from the Community

Stefano Lombardi
August 5, 2025, Observation Tower 2 of Marais du Duer

Tap a clip to paste it into the text box. Welcome to the Gboard clipboard, where the copied text will be saved.

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Nice observation tower but not very suitable for telescopes. Binoculars are preferable. The windows are in the way but avoid disturbing the wildlife and protect from the rain. The Duer is also a walk along the gulf on the waters of which many migratory birds, among others, meet. Too bad we can't put some very recent photos here.

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Den
December 22, 2024, Dolmen des Pierres Plates

A site full of history, with a magnificent view of the bay of Quiberon. Be sure to respect the regulations of the place!

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The observatory is a beautiful wooden tower where you can observe many species of birds. The windows inside are unfortunately dirty with time.

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Alex
September 19, 2024, Dolmen des Pierres Plates

Interesting dolmen right by the sea.

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Breton curiosity to discover

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Seb
June 2, 2024, Butte de César

The Tumiac tumulus is located in Arzon, on the Rhuys peninsula, south of the Gulf of Morbihan, in Brittany. It is also known as Caesar's Mound because, according to local legend, it served as an observatory for Julius Caesar during his war against the Veneti in 56 BC. This building belongs to the large "Carnacean" tumulus, burials of Neolithic elites, such as the Saint-Michel tumulus, in Carnac, and the Ruyk tumulus, in Locmariaquer. https://fr.m.wikipedia.org/wiki/Tumulus_de_Tumiac

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Beautiful views of the islands of the Gulf of Morbihan.

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Frequently Asked Questions

What are some of the most popular natural monuments to visit around Arzon?

Visitors frequently enjoy the Dolmen des Pierres Plates, a historical site directly by the sea with ancient carvings. Another popular spot is Bilgroix Point, which offers stunning views of the Gulf of Morbihan and its strong tidal flows. For wildlife enthusiasts, the Observation Tower 2 of Marais du Duer is highly rated for birdwatching.

Do these natural monuments have historical significance?

Yes, many of Arzon's natural monuments are deeply intertwined with history. The Dolmen des Pierres Plates dates back between 3500 and 3000 BC, featuring ancient carvings. The Butte de César, also known as the Tumulus de Tumiac, is a significant prehistoric mound classified as a historical monument, though currently closed due to collapse risks. The Cairn de Petit Mont, mentioned in regional research, is another ancient megalithic site with layers of history from Neolithic times to WWII.

Are there family-friendly natural monuments or activities in Arzon?

Yes, several natural monuments are suitable for families. The Dolmen des Pierres Plates is an engaging historical site by the sea. Observation Tower 2 of Marais du Duer offers a chance for children to spot various bird species in the ornithological reserve. Bilgroix Point provides an accessible viewpoint to observe the impressive tidal currents.

Can I observe wildlife at any of the natural monuments?

Absolutely. The Observation Tower 2 of Marais du Duer is specifically designed for wildlife observation. Located within the Duer ornithological reserve, it provides excellent opportunities to see many species of birds throughout the year, including geese and teal in winter, and stilts and terns in summer.

What kind of natural features can I expect to see at these monuments?

You can expect to see a blend of coastal landscapes and historical structures. Many sites offer panoramic viewpoints overlooking the Gulf of Morbihan and its islands. You'll also encounter ancient megalithic structures integrated into the natural environment, and areas rich in birdlife like the Marais du Duer.

Are there hiking or walking trails near the natural monuments in Arzon?

Yes, Arzon offers various routes for outdoor activities. You can find numerous running trails, such as the 'Pointe du Monténo – Port-Blanc Beach loop from Arzon' or the 'Magnificent coastal path – Grand-Mont Point loop from Arzon'. For more options, explore the running trails around Arzon.

What cycling opportunities are available near Arzon's natural monuments?

There are several cycling routes in the vicinity. For example, you can try the 'Port Navalo – Pointe de Bilgroix loop from Arzon' which is an easy ride, or more moderate options like the 'Kerver Beach – Goh Velin Beach loop from Arzon'. More details can be found in the cycling guide for Arzon.

What do visitors particularly enjoy about the natural monuments in Arzon?

Visitors frequently highlight the unique combination of ancient history and stunning coastal scenery. They appreciate the opportunity to explore prehistoric sites like the Dolmen des Pierres Plates right by the sea, and the impressive views from points like Bilgroix Point. The chance to observe diverse birdlife at the Marais du Duer is also a significant draw.

Which natural monuments offer views of the Gulf of Morbihan?

Several locations provide excellent views of the Gulf of Morbihan. Bilgroix Point is a prime spot to observe the Gulf's islands and strong tidal currents. The Cairn de Petit Mont, mentioned in regional research, also offers exceptional panoramas overlooking the ocean and the Gulf.

Is there a natural monument that is also an island viewpoint?

Yes, Pointe de Brouel is the westernmost part of the Island of Arz. This viewpoint offers unique perspectives and is steeped in local legend about the separation of Île d'Arz and Île aux Moines.

What is the best time of year to visit the natural monuments around Arzon?

The Rhuys peninsula's coastal nature makes it enjoyable for much of the year. Spring and autumn offer pleasant temperatures for exploring and birdwatching, especially at sites like the Marais du Duer. Summer is ideal for enjoying the coastal paths and views, while winter can provide a quieter experience, with different bird species to observe.

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

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