The Largest Drain Hole In The World

Located in northern California, the Monticello Dam has the largest drain hole in the world. A trumpet-shaped concrete structure next to the dam allows drainage when the lake level is high. When active, it is compelling viewing.

The drain hole, nicknamed the Glory Hole, swallows 48,400 cubic feet of water per second. The distance from the funnel to the exit point - which is situated in the south side of the canyon - is about 700 feet.