Tortuguero National Park sits tucked away in a northeastern pocket of the Caribbean coast. Tied to Costa Rica's mainland by weaving rivers and canals, this isolated park lures nature-seekers looking for a remote piece of jungle paradise. The park houses white-faced monkeys, toucans, jaguars, bright lizards, red-eyed frogs, sea turtles, and blue morpho butterflies. Entry is $15/person.