The Dulce Base is a popular urban legend and conspiracy theory claiming a joint human-extraterrestrial underground facility exists beneath Archuleta Mesa near the town of Dulce, New Mexico. While the real Dulce is a quiet census-designated place on the Jicarilla Apache Reservation, it remains a focal point for UFO lore.

there is a vent that is located in the desert between the 4 corners, whether it is a grate in the ground covered by dust or a random door like vent that goes into the ground, either way these are entrances into one of these bases.