Fernando de Noronha

Fernando de Noronha needs 4 days: Baía do Sancho, repeatedly voted the best beach in the world, on one, diving or snorkeling among sea turtles and spinner dolphins in Baía dos Golfinhos on another, and touring the viewpoints of Praia do Leão and Morro Dois Irmãos on the remaining two. August-December is best, with better underwater visibility. It's Brazil's most expensive destination, with a mandatory daily environmental preservation fee and access limited to a fixed number of visitors per day. The entire archipelago is a UNESCO World Heritage Site and marine reserve, with waters of a clarity rivaling the Caribbean but marine life considered among the richest in the South Atlantic.