Everyone knows Aspen as a top-notch winter resort town. But outdoor enthusiasts will enjoy it in the summer, too, when the mountains become a perfect setting for hiking, biking and horseback tours. Some may be surprised to find it’s a top romance destination—but after all that outdoor exercise, who wouldn’t want to repair to a luxurious hotel room or a cozy, firelit bar?

Despite its name and reputation as a world-class ski resort, Snowmass is not just a one-season Colorado wonder. More than 3,000 acres of terrain parks and halfpipes woo skiers and snowboarders, but 40 miles of hiking and biking trails keep active travelers on the move when the snow melts. The mountain town's boutiques and casual eateries complement the festivals, free music events and rodeo held each summer. When the flakes fall again, a groomed cross-country ski trail links Snowmass to Aspen.

This beautiful fishing village is a Nicaraguan gem, a magnet for surfers and sunbathers. At night, the beach still pulses with activity, thanks to a few popular beachfront bars and nightclubs. Surf clubs abound—catch a wave with an expert instructor if you’re a hang-ten rookie, trying to hang with the surfer big boys.

La Fortuna de San Carlos is at the center of an array of geological wonder. The nearby Arenal is Costa Rica's most active volcano, routinely bursting with lava and ash, and the Catarata de La Fortuna is a waterfall pouring from a seventy-meter cliff. The Tabacon Hot Springs are a relaxing intermission in the midst of the various spectacles, and the Leaves and Lizards Arenal Volcano Cabin Retreat is a blissful end to any day's excursion.

When was the last time you went out for a casual drive and ended up inside a volcano? A surreal scenario comes to life at La Soufrière, one of the most popular attractions in St. Lucia. Pack your skin with the medicinal mud of Sulfur Springs for a DIY spa treatment. Continue your eruptive adventures with a guided hike of the two volcanic plugs known as the Pitons then ascend Morne Fortune to take in the sweeping views. For an intimate beach experience, hit the private black sands of Anse Mamin.