The monkeys and sloths hanging out in this verdant tropical forest are onto something: warm, hilltop breezes and sweeping views of the cobalt Caribbean amidst 250 acres of virtually undisturbed rainforest in which to frolic. The only things better about being a guest in Samasati's treehouse-like bungalows are the (human) creature comforts—warm, wood- and window-lined rooms and inviting...