Randonnée vers la Calanque d'En-Vau en passant par Port-Pin

It was a place that housed the workers in the stone quarry. No-one can say when the tower was added, which gives it the appearance of a castle. Today, the ground floor houses the calanque's harbour master's office and the 3rd floor (accessible via the path you are following) is occupied by staff from the Calanques National Park.

On the surface, it's a small hole just a few centimetres deep in the limestone. What is not visible is the fault at the heart of the rock that runs down to the sea 20 metres below. When the waves hit the rock, they compress the air that escapes through the hole, making a noise like the breath of a sea mammal.