Reminiscence from Joseph Young, Sr. (1878): Joseph Smith taught the City of Enoch was Located in Mexico

  

Joseph Smith said, on another occasion, in the hearing of some of the saints still surviving, that the City of Enoch would again take its place in the identical spot from which it had been detached, now forming that chasm of the earth, filled with water, called the Gulf of Mexico. (Joseph Young, Snr., History of the Organization of the Seventies [Salt Lake City: Deseret News, 1878], 12)