National Geographic calls Corcovado National Park “the most biologically intense place on Earth in terms of biodiversity.” This 164-square-mile sanctuary is Costa Rica’s largest national park and one of the last lowland tropical rainforests in the world.

Hike this jungle preserve with your seasoned guide and look for howler monkeys, sloths, jaguar, puma, exotic birds, and the endangered Baird’s Tapir. Famous for hosting three percent of the biodiversity on this side of the planet—including 500 trees species and millions of insects—Corcovado National Park will forever alter the way you see the natural world.