What is the most mysterious monument in the world that nobody has managed to explain yet?

Dighton Rock was originally located in the Taunton River in Berkley, Massachusetts. It was partly covered at high tide and has since been moved to a museum. The rock is covered with petroglyphs, the origins of which remain unresolved. The rock is 5 feet high 9–1/2 feet wide and 11 feet long. It originally faced … Read more