It may look like a stunning rainbow of colour, but the psychedelic hue of this hot spring in Yellowstone National Park, is a result of years of unintended vandalism by visitors.

Once a brilliant shade of blue, the Morning Glory pool’s appearance has altered dramatically since the 1950s, thanks to an accumulation of coins, rubbish and natural debris.

The pool has been dubbed the Fading Glory, due to the transformation from its original colour to the yellowy-green hue it has today.

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