Coron Island, Coron Palawan Philippines : Twin Lagoons
Twin lagoons separated by a wall of rock. The only access of which is a small crevice underneath the rock, or during high tide, a ladder over the rock.
The temperature of the waters in Twin Lagoon also alternates between warm and cold ( similar to Barracuda lake) where cold freshwater meets the hot salt water called Thermo Cline. As the water become deeper, the temperature increases and becomes warmer due to limestone deposit at the sea bed.