Area 51 is officially revealed and mapped in latest CIA documents. It is not an alien venue. Basically it serves as a testing site for the US government's secret surveillance programs called U-2 and OXCART.
Long rumored Area 51 was never shown any existence before on US maps. But some latest documents released by CIA have officially revealed the existence of this site. Yet it is not an alien area. So a big disappointment for those who actually thinks it to be a site of aerial surveillance covered by government to hide alien traces likes UFO's and spacecrafts. Alien stories linked to Nevada desert began emerging in the middle of 20th century.
A senior fellow at the National Security Archives, Jeffrey T. Richelson, has submitted a Freedom of Information Act request to unveil Area 51 in 2005. Hence the US government has now released its official map and other related documents in response Richelson request.
These reports and Area 51 map shows it to be based in Nevada about 125 miles northwest of Las Vegas. It is a secret site of the government to test worldwide surveillance programs like U-2 (also used in Cold War over the Soviet Union) and other aerial surveillance programs like XCART. But This Google Maps search for "Area 51" map also shows same map that is now officially revealed by the CIA. No new secret is now revealed.