Remember the movie Spielberg film 'Close Encounters of the Third Kind'? The Torre del Diablo (Devil's Tower), in the state of Wyoming (USA) is a natural stone mass over 380 m high. We all recall this place in the film as the location where the contacted appeared. This is the first U.S. National Monument (President Roosevelt). The top of Devil's Tower is flat, although there are not many photos showing this. With special permission it can be climbed, but most tourists only have a walk around, a walk of less than 1 hour accessible to all audiences.