00:00Over 80 years ago, engineers built the world's most terrifying drain.
00:03This is the Bellmouth Spillway at Argentina's San Roque Dam, built in 1944.
00:07Think of it like the overflow hole in your bathroom sink but scaled up to the size of a building.
00:11Most of the year it sits completely dry, but when heavy rain fills the reservoir,
00:15millions of liters of water pour over the circular edge, disappear into the giant funnel,
00:18and race through a hidden tunnel beneath the mountain before safely flowing downstream.
00:22Without it, the dam could overflow during extreme floods.
00:24More than 80 years later, this terrifying drain is still one of the smartest hydraulic engineering designs ever built.
Comments