The peninsula comprises the Mexican states of Yucatán, Campeche, and Quintana Roo; the northern part of the nation of Belize; and Guatemala’s northern El Petén Department.
The Yucatán Peninsula comprises a significant proportion of the ancient Maya Lowlands (although the Maya culture extended south of the Yucatán Peninsula, through present Guatemala and into Honduras and highland Chiapas). There are many Maya archaeological sites throughout the peninsula; some of the better-known are Chichen Itza, Tulum and Uxmal.
- Mayan archeological sites: Chichén Itzá (Yucatán); Edzná (Campeche); Calakmul (Campeche); Becan (Campeche); Uxmal (Yucatán); Dzibilchaltún (Yucatán); Mayapan (Yucatán); Kobá (Quintana Roo); Tulum (Quintana Roo); Ek Balam (Yucatán); Izamal (Yucatán) which also has a large colonial appeal. Also, the Puuc Route, located south of the state of Yucatán, slightly north and along the mountain range called Sierrita, on which the ancient Mayan cities of Loltún, Labná, Kabáh, X-Lapac and Uxmal itself, are located. All these names only to indicate the most renowned sites, although there are others, many in the process of being discovered and excavated and still many unexplored.
- Islands from the coast of the peninsula: Carmen Island and Alacranes reef in the Gulf of Mexico. In the Caribbean: Cozumel, Island of the Women (Spanish: Isla Mujeres), Contoy Island, Holbox Island, Banco Chinchorro, Cozumel, among others.
- Seaports and tourist sites: Chetumal; Bacalar; Tulum; Puerto Morelos; Carmen beach; Cancún; Puerto Juarez; Ria Lagartos; Las Coloradas; Telchac; Chicxulub, Progreso; Sisal; Celestun; Carmen City; San Francisco de Campeche; Champotón.
- Colonial cities: San Francisco de Campeche (World Heritage), the state capital of Campeche; Mérida, capital city of Yucatán state, the largest city in the region; Izamal; Valladolid, in the eastern state of Yucatán and Palisade, in the southwest of Campeche state.