EUTOPIA
THE ENIGMATIC GATE OF THE SUN: A 10-TON, ANCIENT STRUCTURE THAT CHALLENGES MODERN HISTORY
This ancient 'portal' was created out of a single Andesite block weighing approximately 10 tons and is around 9.8 ft. (3.0 m) tall and 13 ft. (4.0 m) wide. Some authors argue that it dates back to around 15,000 BC.