Water from Lake Berryessa flows into the Morning Glory spillway, a vertical drain leading to Putah Creek in Napa, California. Known locally as the "Glory Hole," the circular spillway is 72 feet in diameter and channels overflow 200 feet straight down through a tunnel, helping regulate water levels at Monticello Dam. #Napa #California #Drain #MorningGlorySpillway #LakeBerryessa #Environment #Water | Brut

In the middle of the Monticello Dam in Lake Berryessa, Northern California, there's a massive drain hole. It's called the Morning Glory Spillway, but has also earned the affectionate nickname "The Glory Hole." At 22 meters in diameter, the hole sucks in water from the dam to prevent flooding at a rate of 1,300 cubic meters per second when it reaches capacity, according to Atlas Obscura. The water is carried through a large concrete pipe and emptied about 210 meters away. Follow us!: Engineering

69K views · 476 reactions | A unique phenomenon, dubbed the 'Glory Hole' spillway, was activated at Lake Berryessa in California after a storm swept through the area. | USA TODAY | Facebook