Bohol is the tenth largest island of the Philippine archipelago. Island’s most famous natural attraction is the Chocolate Hills, numerous mounds of limestone formations, hills made of limestone left over from coral reefs during the Ice Age when the island was submerged. It gets its name “Chocolate Hills” because of how it actually looks like huge hills of chocolate during the dry season when the grass turns brown. Other popular attractions are the four main rivers that run through , with the Loboc River running from the center of the island while numerous waterfalls and caves are scattered across. And of course the Philippine tarsier, amongst the world’s smallest primates, that is indigenous to the island.