Badab-e Surt’s springs are two distinct mineral springs with different natural characteristics, located at 1,840 metres (6,040 ft) above sea level in Mazandaran Province in northern Iran

Over the course of thousands of years the water from these two springs emanating from the mountain range have combined and resulted in a number of orange-, red- and yellow-colored pools shaped as a naturally formed staircase.

Badab-e Surt Spring, Iran

Badab-e Surt Spring, Iran

Badab-e Surt Spring, Iran

Other interesting photos of Iran: The other Iran | Photos

Sources: Wikipedia | Badab-e Surt, Bing (pictures)