Blue Beach (also known as La Chiva) on the Caribbean island of Vieques is quite aptly named.  Vieques, which used to be a US Naval Base, boasts some of the world’s most beautiful and unspoiled beaches.  Because many of the island’s idyllic beaches are protected (no hotels can be built on the beach) you will need to rent an off-road vehicle to properly explore this slice of heaven. Remember you will have to bring everything with you- including towels, umbrellas and snacks- as this beach is isolated and not commercialized.  You can reach Vieques (which is part of Puerto Rico) by taking a short 18 minute flight from San Juan.