Lake Crescent is amazing. It is super clear, but super freezing to the touch.
Lake Crescent was formed by glaciers way back when. It was, at one time, a river. A major landslide happened causing it to be dammed up thus creating the lake.
The lake is the second deepest lake in the state of Washington. It's official depth is 624 feet.
Most of the lake is a sheer drop off from the shore.