It is a scene of almost apocalyptic proportions.
People seem to ants, they are looking at a tremendous rush of water flowing through the gaps in a dam in China, as part of a carefully choreographed to remove silt of the Yellow River in Luoyang, Henan Province.
The silt-carrying water gushes out of three specialised holes in the dam of the Xiaolangdi Reservoir on the Yellow River during the annual silt-washing operation.
The Yellow River authority says such operations lowers the river bed in the lower reach of the river by an average of 2.03 meters each year.
The dam stands at 154m (505ft) tall and is 1,317m (4,321ft) wide. When it was built opened in 2000, following a six-year construction, it had cost US$3.5billion to construct.