The 1943ft-deep crater filled with crystalline waters in Crater Lake National Park is the deepest lake in America and one of the ten deepest in the world. Formed after a volcanic eruption 7700 years ago, today the lake is the centrepiece of a 740 square-kilometre national park, which is like a winter wonderland for most of the year, as from October to June it’s covered in snow.
Top image © Wollertz/Shutterstock
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