The huge hole in Berryessa's California lake: the images from above of the 'Glory Hole'

Water from Lake Berryessa flows into the Morning Glory spillway, a vertical drain that leads to Putah Creek in Napa, California. Known locally as the Glory Hole, the circular spillway is 72 feet in diameter and channels the overflow 200 feet through a tunnel, helping to regulate the water levels of the Monticello Dam. The article Berryessa's huge hole in Lake California: the images from above of the 'Glory Hole' comes from Il Fatto Quotidiano.