8. Stone of Davasko in Argentina
This huge boulder has lost its battle against gravity. The stone that weighs more than 300 tons had been sitting on the edge of a massive rock for several thousands of years before tilting a bit. The locals checked it — they put a glass bottle at the bottom and it cracked. On February 29, 1912, the Davasko stone fell down. It was a real shock for the local people. And 95 years later, they put a plastic copy of it back. It weighs only 9 tons and is fixed on the rock.