Titan I OSTF-8
Air Force Base: Vandenberg
State: California
Coordinates:
Latitude: 34°48'15.47"N
Longitude: 120°32'46.35"W
Decimal:
This was a Operational Suitability Test Facility for Titan I.
The reason this silo opening has no doors is due to an explosion in the 60's. Part of the debris is still visible in the image below, although it blends well with the ground after all of these years. The specific launch was, I believe, on December 3, 1960.
List of all Titan I site Coordinates
Detailed information about the Titan I Intercontinental Ballistic Missile can be found here.