The Nevada Test Site.
Contrary to popular belief it is actually possible to pay it a visit. After you jump through all the hoops, which is completely understandable. Just this one area of Nevada is larger than some eastern states. Area 51, a popular topic among alien hunters is inside the test site. So are the U2 and other super secret weapons. The word is that a lot of the futuristic Nazi stuff is inside one of the hangars. Like the Horton flying wing for example. Most people just drive up to the Alien Mail Box. Yes indeedey it is possible to write a letter to your favorite alien. Just deposit your missive in that mail box. Do not forget the proper frankature. and the correct address. People try to enter the test site from there. Forget it, don’t even try it. Even if you get inside you will not get anywhere fast There are miles of dry, burning desert. Like I said before, that area is really large. besides, you get yourself arrested real fast.