Puerto Rico’s El Yunque rain forest may be better known, but this small island has incredible geographic and botanical diversity beyond that park's boundaries. Exhibit A: the Dry Forest of Guánica. Less visited by travelers than the rain forest, the Dry Forest, located on the southern coast, is studded with cacti and other arid plants. Travelers who enjoy hiking will have fun exploring the forest’s trails. Just be sure to bring water as the heat and humidity can be punishing, and there are no facilities at this park.