Sweetness

The Falkirk Wheel, a boat lift connecting two canals near Falkirk, Scotland is one hell of a tech dream!!

Thanks to Archimedes’ principle (floating objects displace their own weight), each water-filled caisson weighs the same amount. That allows the entire counter-balanced tip to bring boats—water and all—up or down to the next canal using just a 1.5 kilowatt-hours of energy—the same amount of energy it takes to boil eight kettles of water.