Secret Lagoon is surrounded by limestone karst cliffs in El Nido, Palawan. This lagoon is called secret because people are unable to see the lagoon unless they enter a small hole. This hidden lagoon is within an island with a pristine white beach and crystal clear water. You go there to enjoy the view from the beach, the beach itself and to explore the Secret Lagoon. As you enter into a small hole, you will see a massive caldera that was once a cave which collapsed and now is surrounded by karst cliffs. In the middle is a lagoon.