Area 51 is a name used in official CIA documents (at least since 1967) for a military base that is located in the southern portion of Nevada in the western United States, 83 miles (133 km) north-northwest of downtown Las Vegas. Situated at its center, on the southern shore of Groom Lake, is a large secretive military airfield. The base's primary purpose is to support development and testing of experimental aircraft and weapons systems.
Its secretive nature and undoubted connection to classified aircraft research, together with reports of unusual phenomena, have led Area 51 to become a focus of modern UFO and conspiracy theories. Source: Wikipedia
A must see is the 'Cosmic Conspiracies' Area 51 section. The secret airbase that officially doesn't exist! Here you'll find the latest satellite pictures, and possible the closest pictures of the base ever released, radio frequencies and information about this top secret base. Click for more