318K views · 353 reactions | This is just mindblowing!  FYI: Following heavy rain from Storm Doris, water cascades into one of two bellmouth overflows on the Ladybower Reservoir. Known locally as 'the plugholes', the giant stone drains are 80 ft in diameter. Most of the year the top of the bellmouths are above the water level near the dam wall only allowing extra water to drain from the reservoir into the River Derwent after heavy rain. | Shareably | Facebook