Coron is the largest town on Busuanga island in the province of Palawan. The town and the islands just offshore are a magnet for visitors seeking crystal-clear waters, fascinating sea life and no fewer than ten well-preserved shipwrecks from WWII. Coron Island is a popular choice, with numerous spectacular snorkeling sites, including Siete Pecados, the Twin Lagoons and Atuwayan Beach. One interesting phenomenon here is a reverse thermocline, with the water being warmer at depth, where it is heated by the volcanic activity that lurks beneath the islands, and cooler nearer the surface. One place where this is dramatically evident is at Busuanga Island’s Maquinit Hot Springs, one of the very few saltwater hot springs in the world. A visit here should include a dip in the spa-like set of pools that vary in temperature from hot to cooler.