Belle-Île-en-mer

If you want to learn to dive in France, this 85-square-kilometer island in the choppy seas of the Atlantic Ocean is a great place to start. At an average altitude of 40 meters, Brittany's largest island overlooks the sea. The island's rocks are made up of a friable rock consisting largely of shale that has been heavily eroded by the water, giving it a jagged appearance. Water has also carved strange landscapes on the seabed, including a jumble of caverns, fissures, canyons, and tunnels of all types.

The area's colorful flora colonized the rocks, giving it the appearance of a tropical garden! Fish eagerly wait for dusk to hunt in the various spaces. Lobsters, crabs, and other crustaceans, among other aquatic species, live in these fissures. Finally, the trawler Philippe Eric and the Hanan, both lovely wrecks off the shore of Belle-Ile, should be noted.

• Location: Morbihan