If waterfalls, hot springs, wildlife and volcanoes are your thing, then Arenal Volcano National Park will take your breath away. One of the world’s most active volcanoes burps tufts of smoke in the background as you make your way through forests and old lava fields. Take a rafting tour or hit the beach, then retire to a comfy hotel.

Ambergris Caye hovers in a holiday sweet spot: just enough amenities to make it exciting, but not so overdeveloped that you’re tripping over flip-flopped tourists. A mangrove swamp is the eye of this white beach island, the largest in Belize, and golf carts are the main form of transportation along the sandy roads. Reef divers drool over the Belize Barrier Reef and the Blue Hole, a 400-feet deep circle of limestone that teems with angelfish, elkhorn coral, cleaner shrimp and stalactites.

Ecotourism is alive and kicking on St. John. There's more than enough to do on land, from watching for wildlife in the national park to hiking miles of trails or strolling sandy white beaches. Hit the water for amazing snorkeling, swimming, even underwater photography—of course. This is the Caribbean, after all.

Powdery sand meets turquoise water in Santa Maria, where morna music pours from beachside bars just a short drive from Ilha do Sal's airport and capital city. Add the sun-and-saltwater resort scene to energetic nightlife, and you get one of Cape Verde’s most popular escapes.

A coastal town just 20 miles west of Lisbon, Cascais was once a small fishing village, but its idyllic scenery attracted the attention of artists, writers and expelled European nobility in the 20th century. Today, it still attracts high society, but all society comes in force to enjoy the gorgeous beaches and adventure options like sailing and surfing. The Conde de Castro Guimarães Museum, a former palace, is now open to the public and displays an impressive collection of art and artifacts.