2. Crater Lake, Oregon

Located in Oregon, USA, Crater Lake (talk about an obvious name!) is the ninth deepest lake on the planet with a depth of 595 meters. This lake was formed after the Mount Mazama collapsed many years ago, leaving a deep crater filled with crystal clear waters. There is also a legend which surrounds this lake. The Klamath tribe are said to have witnessed the mountain Mazama collapse and form the lake. They say there was a battle between Skell the Sky God, and Llao the God of the Underworld. The legend goes that Mount Mazama was destroyed in the battle. Klamath people used the lake in vision quests, and were said to have spiritual power if they succeeded in their dangerous quest.