72-ft wide 'Glory Hole' opens up on US lake to drain excess water, pics surface

A gigantic 72-feet wide hole known as 'Glory Hole' has yet again opened up after the water level exceeded in the Lake Berryessa reservoir in the US. Built in the 1950s, 'Glory Hole' is a 75-metre-long tunnel that functions as a drain hole to swallow excess water. The hole appears to have a spinning vortex effect on the lake's surface.