La Piscine is a popular diving site located off the coast of Hammamet, Tunisia. The site is also known as The Swimming Pool or The Pool, and it is a submerged cave that was formerly a limestone quarry. The cave is about 20 meters deep, and it has two entrances: The main entrance, which is a narrow tunnel located at a depth of 10 meters The back entrance, which is a larger opening located at a depth of 15 meters