The Balearic Islands are considered some of Spain's most visited destinations, and for good reason. Each of the four inhabited sister islands offers something for every type of traveler, from hiking or prime nightlife to the best untouched beaches on this side of the Mediterranean Sea. We caught up with our favorite travel advisors, Fora Travel, the best source for all the happenings on the islands and beyond, and picked their brains on why you should head there this year (and possibly the next).