Boca de Agua Bacalar

Stilted treehouse rooms float over Bacalar lagoon, where the water runs an improbable shade of turquoise that makes you question every beach you've ever visited. This small eco-resort sits right on the banks, with jungle views that occasionally include a spider monkey going about its business. Mayan ruins are nearby, nature excursions are plentiful, and the spring-break crowd hasn't found it. The Michelin Guide awarded it one Key.