At present, what can be visited in the Ruins of Tenochtitlán are the remains of the Templo Mayor and the monumental sculptures of Tenochtitlan. You have all the information in: «Discovering the Aztec Ruins: Ruins of Tenochtitlán«.
You have all the information in: "Discovering the Aztec Ruins: Ruins of Tenochtitlán".