The day Niagara Falls ran dry: Here's what it looked like Niagara Falls is one of the most powerful waterfalls in the world, with 4.5 million gallons of water flowing over the American and Bridal Veil Falls every minute. But in 1969, the waterfall ran dry. This section is not as big as the Horseshoe Falls, but two major rockfalls left massive boulders at the base of the American Falls... #Engineering #History #Geology
