Peach Mountain Observatory was created in 1955.
Pine Mountain Observatory was created in 1967.
West Mountain Observatory was created in 1981.
Tortugas Mountain Observatory was created in 1963.
Purple Mountain Observatory was created in 1934.
Table Mountain Observatory was created in 1924.
A Mountain Observatory - 1918 was released on: USA: 20 February 1918
Jura Observatory was created in 1993.
Detroit Observatory was created in 1854.
Sphinx Observatory was created in 1937.
Ursa Observatory was created in 1926.
Carter Observatory was created in 1937.
Corralitos Observatory was created in 1961.