This unusual sight can be seen in the San Francisco Bay where artificial pond water evaporates and leaves only crystallized salt, coloured algae and micro-organisms. Ponds with low or medium salinity have a green or pink colour and as the salinity increases, the water takes on a more reddish pigment. In addition, the weather also influences the colour of the body of water as more rain makes the water more transparent.
A popular tourist attraction in Indonesia, this muddy pond erupts with an explosion of mud and a plume of white steam every two minutes and these eruptions also shift positions from time to time. Bledug Kuwu, is the local name for something that burst in a pool and visitors can watch the geyser from a distance of 10-20 meters away.
The unique hydrological phenomenon takes place near the Polish town Wągrowiec. Two rivers – Wełna and Nielba – cross each other without having their waters mixed and continue to flow in separate beds. The researchers have once colored the water of the rivers in different colors and the paint didn’t mix.