Cathedral of Salamanca constructed in 1102 features magnificent stone carvings on all its walls, but one of them appears to be a fully dressed astronaut in a space suit. What a century astronaut is doing on the walls of a c.
Located on a hilltop in North Salem, NH are perhaps America's biggest unexplained ancient structures. 22 structures over 20 acres. Researchers have not determined who built them or when they were built. but estimates range from 500 to years old.