3. Dulce Base, United States
In 1979, American businessman Paul Bennewitz became convinced that he was intercepting electronic communications from aliens outside of Albuquerque, New Mexico in a town named Dulce. Since then, the area where he discovered signals has come to be known as the Dulce Base and is said to be a joint government-alien biogenetic laboratory that carries out experiments on humans and animals. The upper level is controlled by the government while the lower levels closest to the Earth are reportedly run by extraterrestrials. A man by the name of Phil Schneider claimed to have helped build an entrance to the top-secret base but was later found dead in his apartment, with a piano wire wrapped around his neck.