Ferrocarriles Unidos de Yucatán was a 3 ft (914 mm) narrow gauge railroad that operated in the state of Yucatán in Mexico. The last 4-4-0 locomotives built by Baldwin Locomotive Works were made for this railroad. Locals referred to its locomotives as toros de fuegos (English: bulls of fire).
Disney connection
Five of this railroad's steam locomotives were bought by Roger Broggie on behalf of the The Walt Disney Company in 1969. Four of these were completely rebuilt and are currently operating on the Walt Disney World Railroad.
References
Ferrocarriles Unidos de Yucatán Wikipedia(Text) CC BY-SA