The Missionary Training Center of The Church of Jesus Christ of Latter-day Saints is located in Provo, Utah adjacent to the campus of the Brigham Young University. Quoting from the MTC's website:
The MTC’s campus has 19 buildings on a 39-acre site, with a capacity of housing and training 3,700 missionaries. Over 600,000 missionaries from nearly every country in the world have come to the MTC for training. The MTC trains missionaries for all of the Church’s missions and gives instruction in 55 languages.