The Falkirk Wheel is a rotating boat lift connecting the Forth and Clyde Canal with the Union Canal. The difference in the levels of the two canals at the wheel is 24 metres (79 ft), roughly equivalent to the height of an eight storey building. However the Union Canal is 11m higher than the aqueduct which meets the wheel, and boats must pass through a pair of locks to descend from this canal onto the aqueduct at the top of the wheel. The aqueduct could not have been positioned higher due to conflicts with the historically important Antonine Wall.

Two sets of these axe-shaped arms are attached about 25 metres (82 ft) apart to a 3.5 metres (11 ft) diameter axle. Two diametrically opposed water-filled caissons, each with a capacity of 80,000 imperial gallons (360,000 l; 96,000 US gal), are fitted between the ends of the arms.

It takes just 22.5 kilowatts (30.2 hp) to power the electric motors, which consume just 1.5 kilowatt-hours (5.4 MJ) of energy in four minutes, roughly the same as boiling eight kettles of water.

The wheel is the only rotating boat lift of its kind in the world, and is regarded as an engineering landmark for Scotland.

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