Best getaway: Morgan's Rock Hacienda & Ecolodge, Nicaragua (from $2,668; morgansrock.com)

Why it's green: This five-star resort, part of a reforestation project and private nature reserve, features furniture crafted by regional artisans using local trees and wood leftover from the hotel's construction.

Why it's great: Cliffside bungalows scattered throughout the forest have garden showers, intimate decks and dramatic oceanviews. Plus, the resort has every activity imaginable, from hiking to surfing.