The Langun-Gobingob Cave System of Calbiga, Samar, Philippines, known to be East Asia’s biggest karst cave system measuring to 2,968 hectares — offers the penultimate caving experience. The cave is endowed with gigantic columns, underground rivers, sinkholes, magnificent stalactites and stalagmites, blind fishes and white crustaceans. The Langun-Gobingob Cave is suitable for trekking, swimming, cave camping and rope sports. Be amazed with the swirling “bat flight” at the Langun exit every 5:30 p.m. With a cathedral-like dome estimated to have the size of three football fields, it was first explored by an Italian Speleologist in 1987. Spelunkers will surely enjoy exploring the Langun-Gobingob caves of Calbiga, Samar, said to be the 2nd largest Karst cave in the world.