An alien Stonehenge with a sinister purpose, an eerie building filled with strange labyrinths, and an endless concrete track in the middle of nowhere are deserted engineering projects. Stories: 1) The Henge, Ludwikowice Kłodzkie, Poland; 2) Old Millfun, Shanghai, China; 3) Aerotrain Test Track, Chevilly, France; 4) Secret Nuclear Bunker, Kelvedon Hatch, England