Purple Mountain Observatory was created in 1934.
Table Mountain Observatory was created in 1924.
Tortugas Mountain Observatory was created in 1963.
Peach Mountain Observatory was created in 1955.
Pine Mountain Observatory was created in 1967.
West Mountain Observatory was created in 1981.
A Mountain Observatory - 1918 was released on: USA: 20 February 1918
Haleakala Observatory was created in 1961.
Dearborn Observatory was created in 1889.
Kiso Observatory was created in 1974.
Stellafane Observatory was created in 1924.
Steward Observatory was created in 1916.
Union Observatory was created in 1903.