Cancun's Peninsula is the Yucatan Peninsula, a large peninsula in southeastern Mexico that separates the Caribbean Sea from the Gulf of Mexico. It is bordered by the states of Quintana Roo to the east and south, Campeche to the southwest, and Yucatán to the west and northwest. The Yucatan Peninsula is home to many Mayan archaeological sites, including Chichen Itza, Tulum, and Coba. It is also known for its stunning beaches, lush jungles, and vibrant culture.