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A crystal clear river is so clean that the 50ft deep riverbed can be seen from a bridge crossing over the water.
The 30km long Verzasca River in Switzerland is renowned all over the world for its clear turquoise waters.
But while pictures of the sparkling waters are often taken from the mountains surrounding the river or from bridges crossing over it, it`s much rarer to see photographs taken from the bottom of it.
Under the bridge: This stunning photo by Claudio Gazzaroli, 38, shows the arched Roman Bridge crossing over the Verzasca River in Switzerland from 50ft under water.
From the bottom of the deep: The Verzasca Riverbed can be seen with startling clarity because the water is so crystal clear.