Sizzling thermal waters flow from volcano-heated springs in remote, rugged Patagonia. It’s the ideal spa destination for those who want some eco-adventure when they emerge from the therapeutic waters. The most decadent spa address is Puyuhuapi, in the north of the region, accessible only by boat.

Normally, one wouldn’t equate "relaxing spa holiday" with "hanging out near an active volcano," but if you’re up for something more exotic than facials and massages, Banos might be the perfect place for you. The thermal mineral pools here are heated by the volcano, and while there are several, offering different amenities, the easiest one to visit is Las Piscinas de la Virgen. Banos also has plenty of outdoor activities, like rafting and biking on scenic paths.

Sure, you can leave the sunny sands in favor of a crocodile watch or horseback ride, but when the main strand is called Seven Mile Beach, it's clear what draws most visitors to Negril. Depending on how much sun you want, you're welcome to go topless or even sunbathe in the buff in some places.

The Dominican Republic lies in the same waters as Cuba and Puerto Rico, taking up the eastern two-thirds of the island it shares with Haiti. Offering a lush interior with a mix of caves, Victorian gingerbread houses and the lore of pirates, plus 900 miles of coastline along its brim, island highlights include riding a cable car up Mount Isabel de Torres and basking on stunning Saona Island. Oh, and did we mention the D.R. is family-friendly, has just about perfect weather and is affordable?