World's Best Treehouse Hotels

Why It’s Unique: The 10-acre beachfront property, located in the Gandoca-Manzanillo Wildlife Refuge on Costa Rica’s southern Caribbean coast, features a sustainably built treehouse made from fallen trees, with solar heating, two bedrooms, a kitchen, and a shower built around the crooks and roots of a massive 100-year-old Sangrillo tree.

Access: Hanging steel bridge.

What to Do: Snorkel or kayak off the nearby Punta Uva Beach.