There's something similar out in the woods of the "outer limits" of Chapel Hill, NC. I tried to get a picture once, but it is difficult due to trees surrounding it. Besides, if I stay in one place too long to snap a shot, they may lock onto me with their tractor beam. The next thing I know I would be having flashbacks of being on an operating table surrounded by tall grey skinny men with large heads and small bodies. :laugh:
I drove by this house at least twice a day for 10 + years. If I remember correctly it looked like it was made of concrete. The stairs actually could be retracted into the belly of the ship. It is on a major road going up the side of Signal Mt, Tn and everyone in Chattanooga knows this house.