Genovesa is known more often by its English name of Tower and lies north of the equator. Genevosa is the remains of an extinct volcano that is open to the sea on the south side.

The caldera of the volcano forms a cove, the Darwin Bay, with sheltered by high cliffs. The island is very dry and flat and mostly inhabited by birds. There are large colonies of red-footed and masked boobies. The water can be warmer than at the central islands, thanks to the Panama current.

Darwin Bay: There is the possibility to either dive along the inner wall or go to the outer wall, which is less protected. An other possibility is to dive from the outside of the volcano through the channel into the caldera. You might see groupers, jacks and barracuda, eagle rays, tunas and schools of smaller fish and sometimes mantas or hammerheads.