Yucatán Peninsula

The Yucatán Peninsula separates the Gulf of Mexico from the Caribbean Sea, encompassing 3 Mexican states, plus portions of Belize and Guatemala. On the Caribbean, Mexico's Riviera Maya resort strip is bookended by 2 popular destinations: Cancún, with its high-rise hotels and nightlife, and, down the coast, quieter Tulum, a rare seaside example of the Mayan ruins found throughout the peninsula's interior.