­Many years ago I was lucky enough to visit the island of Vieques, off Puerto Rico. My two key memories are the stunningly eerie phosphorescent bay, and nearly vomiting on the boat ride from the mainland. Back then, there weren't any hotels of note on Vieques, so taking a day trip on a vomit comet boat was the only way to experience the island. These days, guests can choose from the sleek Hix House or the just opened W Vieques.

Formally called the W Retreat and Spa Vieques, the resort has 157 rooms. Alain Ducasse is in charge of all the food, which features a Latin Caribbean blend. The decor, as you'd expect, is stylish and understated. The W even has its own tiny airport lounge to...