They are lava formations, eroded by water, of great interest as they offer us an incredible view. You can take a walk in the tunnels, and if you are lucky you can see birds such as blue-footed boobies, and if it is mating season you can see the beautiful dance between these wonderful animals, always ready to offer you a show. However, the visit will always depend on the marine conditions, depending on the time of year, most of the time the conditions are favourable.