Dunn's River Falls ranks up there with reggae and rum as one of Jamaica's emblems. The waterfalls are famously climbable. Visitors hold hands and trek up the 600 foot of rock, looking like paper chain people. Finally, you'll get the chance to explore the Green Grotto. These caves make a honeycomb out of the coastal rock, halfway between Ocho Rios and Montego Bay. They're 1525 metres long and 12 metres deep, and their highlight is an underground lake.