7. Tonopah, Nevada
About 70 miles northwest of Area 51 is a place so secret, even people in the U.S. intelligence community rarely talk about it. Called the Tonopah Test Range, F-117 Nighthawk stealth fighter was kept under wraps there for ten years without anybody but the president and the highest reaches of the U.S. military knowing about it.
The Nighthawks left Tonopah years ago but the highly secret base remains operational. This begs the question: What's being kept there now?