Marseille

If you plan to dive in France, be aware that the deserted islands of Mare, Jarron, Jarre, and Riou Plane, as well as a few islets, may be found in a single file off the coast of Marseille. Divers can enjoy a beautiful underwater display of reliefs, high walls, huge wrecks, and luxuriant biodiversity on these group of islands with remarkable natural heritage. Some of the best dive sites in France can be found in this archipelago, such as "The Imperials," a series of drop-offs covered with red gorgonians where pelagic fish such as bass, sea bream, dentex, and barracudas are plentiful.

Don't forget to dive "the Pharillons," a fantastic dive site with a breathtaking 45-meter drop-off behind which you'll find rare and stunning white gorgonians as well as magnificent arches cut into the rock. With its drop-off, swarms of gorgonians, and 30 meter fault, "the big Conglou," which is now partially restricted, is nevertheless a diving paradise in Marseille.

• Location: Provence