Old Tucson Studios in Tucson, Arizona was constructed in 1939 as a movie set for the movie Arizona. After that it lay unused for many years until it was used as a set for some more movies. It was opened to the public as a theme park and also a working film studio. Since then it has been used for many movies and television shows. To meet the requirements of the movie industry many additional buildings "sets" have been constructed over the years.
To this day it is still both a woring movie set and a theme park