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Glory Hole - Monticello Dam, California
Lucky13 knows what a glory hole is but for the rest of us laymen, a glory hole is used when a dam is at full capacity and water needs to be drained from the reservoir. This is the 'Glory Hole' at Monticello dam, and it's the largest in the world of this type of spillway, its size enabling it to consume 14,400 cubic feet of water every second.