In this fast-growing municipality's downtown, pastel buildings give the main plaza the look of a child's nursery: a golden-yellow church on one side faces a butter-yellow city hall, and a pink-and-blue amphitheater anchors one corner. It's a good spot for people-watching until the heat drives you to the beach.
Offshore, Cayo Santiago—also known as Monkey Island—is the site of some of the world's most important rhesus-monkey research. A small colony of monkeys was introduced to the island in the late 1930s, and since then scientists have been studying their habits and health, especially as they pertain to the study of diabetes and arthritis. You can't land at Cayo Santiago, but Captain Frank Lopez sails a small tour boat—La Paseadora—around it.