Piedra Movediza

Piedra Movediza (lit.'Moving Stone') was a balancing rock located in Tandil, Buenos Aires Province, Argentina. It weighed about 300 tons. It attracted attention and tourists because of the way it was balanced on the edge of a hill. The stone fell and broke on 29 February 1912. Some sources say it fell due to vandalism or vibrations caused by explosions in a nearby quarry.