Puerto Rico has long been synonymous with an easy, no-passport-required dose of sun and sand. But the island is more than just pristine white sand and shimmering turquoise waters. Puerto Rico also has a rich imperial history, a vibrant culture and culinary scene, and verdant jungle-clad peaks that rise some 4,000 feet above sea level. Here, your 36-hour guide to hitting the island’s hot spots, historic sites, electrifying rainforests and, of course, tropical beaches.

For many travelers, a Caribbean vacation means visiting renowned spots like Jamaica or The Bahamas. While these destinations offer beautiful beaches and rich cultures, there are some lesser-known Caribbean islands that can further broaden your experience, whether you’re looking for untouched beaches or incredible historical sites. Now, with more than 7,000 islands in the Caribbean—dozens of which you can visit on a Royal Caribbean cruise, where should you start?