Corcovado Treehouse

The Osa Peninsula is the wildest corner of Costa Rica — National Geographic's 'most biologically intense place on earth' line gets quoted for a reason — and this three-level treehouse home sits on its own 200-plus-acre rainforest reserve just north of Puerto Jiménez, the gateway town for Corcovado National Park. Five bedrooms across the levels sleep a group of eight, which is rare out here, and there's a pool, a full kitchen and ocean views over the Golfo Dulce. The wildlife list is the draw: titi (squirrel) monkeys, sloths, scarlet macaws screeching overhead, toucans, and whales in the gulf during season. Beaches and mangrove estuaries are minutes away; Corcovado day trips with a guide leave from town. Fly into Puerto Jiménez's airstrip or drive — it's far from everything, which is exactly the point. Bring a 4x4 and book Corcovado permits early.