Best natural monuments around Châteauneuf-Les-Martigues are found nestled between the rocky Massif de la Nerthe and the Étang de Berre. This region features a rich natural heritage, including hills, lake areas, and beaches. The diverse environments support exceptional flora and fauna, with some protected species. Notable natural features include the Étang de Bolmon and the Plage du Jaï.
Last updated: May 20, 2026
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Popular around Châteauneuf-Les-Martigues
A short detour from the main path, along the road, offers magical and unusual viewpoints.
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Description of the hike: follow the path from the parking lot to reach the source. The start is under a large metal portico bearing the inscription "Chemin de l'Infernet". The walk is part of the GR13. It is marked with red and yellow lines. A very simple little walk, no equipment necessary. Very few places for parking!
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Superb loop with amazing panoramas!
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Very very nice hike. Maybe just correct the difference in altitude (280 m cumulative) which in my opinion does not classify it as easy but as intermediate. But it's done well and it's very pleasant!
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Very curious site! Go there, it’s worth the detour!
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Access is from the tamarisks, respect the route and above all the environment. THANKS
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The source of the Infernet seems to be a natural underground water source when it is in fact the result of an artificial watercourse, the Réaltor basin built in 1869. The source finally stops when it meets the pond of Bolmon.
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Reasonably spacious cave. Did people live here in the past?
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Visitors frequently enjoy the Jonquier Viaduct for its amazing panoramas and proximity to a wild beach. Another favorite is the Calanque of the Salt Waters, appreciated for its pleasant setting and as part of a very nice hike. The Infernet spring also offers a simple and enjoyable walk.
Yes, the region is rich in history. The Baou Tailla Quarries are historically significant, having supplied stones for Marseille's builders. Additionally, the Fortin du Saut is a steep rocky peak that was occupied between 2500 and 1800 B.C., making it a significant prehistoric archaeological site. The Abri de la Font-des-Pigeons is another key prehistoric rock shelter, dating back to the Mesolithic period, with finds exhibited at the Musée des Amis de Castrum Vetus.
The area boasts diverse natural features, including hills, lake areas, and beaches. You can explore the sandy, pebbly Jonquier Viaduct beach, the unique Calanque of the Salt Waters, and the artificial Infernet spring. The Étang de Berre and Étang de Bolmon are prominent lake areas, with the latter being a Natura 2000 site rich in flora like salicornia and reed beds.
Absolutely. The Infernet spring offers a very simple walk, suitable for families. The Plage du Jaï is accessible year-round for various leisure activities, including safe swimming during summer, and its preserved natural site allows for rediscovering local flora and fauna, which can be an engaging activity for children. The Étang de Bolmon also has a discovery trail and observatories, perfect for wildlife observation.
The Étang de Bolmon and its surrounding marshes, often called 'petite Camargue,' are ideal for observing diverse wildlife and flora. Observatories and a discovery trail have been set up along the Bolmon to enhance visitor experience. The Plage du Jaï, part of the Natura 2000 network, also allows visitors to rediscover rich local flora and fauna.
The region offers excellent opportunities for hiking, cycling, and running. You can find various routes, such as the 'Jaï Beach – Bolmon Pond loop' for cycling or running, which takes you past significant natural areas. For more detailed routes and options, explore the Gravel biking around Châteauneuf-Les-Martigues, Cycling around Châteauneuf-Les-Martigues, and Running Trails around Châteauneuf-Les-Martigues guides.
Yes, you can visit the Cave with Two Entrances, described as a curious and reasonably spacious site. The Baou Tailla Quarries also present unique geological features with their shell limestone formations and 'carved steep slope' landscape.
The natural monuments are generally accessible year-round. For activities like swimming at Plage du Jaï, the summer months are ideal as a two-kilometer section is designated for safe swimming and holds a 'quality bathing water' label. For hiking and wildlife observation, spring and autumn offer pleasant temperatures and vibrant natural scenery, avoiding the peak summer heat.
Certainly. The Jonquier Viaduct is known for offering amazing panoramas. Additionally, the Baou Tailla Quarries provide magical and unusual viewpoints, and the Fortin du Saut, a steep rocky peak, overlooks the Étang de Berre, offering impressive vistas.
The Plage du Jaï is a unique 6.5-kilometer sandy, pebbly, and shell-covered beach along the Étang de Berre. It's known for its exceptional deposit of clams and cockles and is a preserved natural site where visitors can rediscover rich local flora and fauna. A section is designated for safe swimming in summer, and the area is part of the Natura 2000 network due to its significant biodiversity.
The Étang de Bolmon, along with its surrounding marshes, forms the largest and most diverse natural area on the shores of the Étang de Berre, spanning 800 hectares. It is classified as a Natura 2000 site and is incredibly rich in flora, including salicornia, reed beds, and orchids. Often referred to as 'petite Camargue,' it's a prime location for observing diverse wildlife and has observatories and a discovery trail for visitors.
Yes, many natural monuments are integrated into walking paths. The Infernet spring is part of the GR13, offering a simple walk. The Étang de Bolmon features a developed discovery trail. Additionally, a 'Prehistory Trail' (Sentier de la préhistoire) allows visitors to discover the Abri de la Font-des-Pigeons.


Extend your search for the best caves by checking out these guides of the top ones around Châteauneuf-Les-Martigues: