Coron is the name everyone uses, but it covers three things: Coron town, a working harbour on Busuanga Island; Coron Island across the water, a wall of black-and-green limestone that is ancestral land of the Tagbanua people; and the scattered islands and reefs of the Calamian group around them. The town is functional rather than pretty. The point is what lies a short boat ride away.
That means lakes of brackish, glass-clear water held inside cliffs, white-sand islands on the outer reefs and a fleet of Japanese supply ships sunk by US aircraft in September 1944. Divers come for the wrecks; everyone else comes for the lakes and stays for the islands. Three or four nights is right for most people.