Usoi Dam is a natural landslide dam along the Murghab River in Tajikistan . At high , it is the tallest dam in the world , either natural or man-made . The dam was created on February 18 , 1911 , when the 7.4-Ms Sarez earthquake caused a massive landslide that blocked the flow of the river
Sarez earthquake
1911 Sarez earthquake
Usoi Dam