Everyone has an idea what a lock in a canal or waterway is? Its simply a way of getting watercraft to a higher or level of water usually by flooding water in or draining water out to raise or lower the the boat to get to a higher or lower level of water. Water locks have been around for hundreds of years, but we have now invented an alternative. Although the capital cost was probably quite high, the running costs are very low, with power consumption only what a household might use with most appliances running.
Jayne gave me the tip off about the Falkirk Wheel. It is in central Scotland and joins the Forth and Clyde canals with the Union Canal. It was opened by Queen Elizabeth II in 2002.
A picture can tell a thousand words, a You Tube time lapse video, ten thousand words in ten seconds. You may need to watch it twice to absorb what you are seeing.