Cramming an astonishing range of cultural and natural wonders into a relatively small package, Belize is the adventure world’s best-kept secret. On this activity-packed trip, we navigate jungle trails, float through the Mayan underworld, snorkel the Belize Barrier Reef, and cross into Guatemala to visit one of the most important and impressive Mayan ruins in the world, Tikal. The adventure is capped with a stay on Caye Caulker, the quintessential palm-strewn, white-sanded Caribbean island.