We visited the Falkirk Wheel last month! It lifts 500 tonnes 80ft into the air using only 1.5KWh of power (it's actually energy N•m/s).

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Took the kids to see the kelpies last week, think I'll take them to see this next - thank you for sharing

Oh you should! I think you can ride it for like 14 quid too. There's a nice cafe and museum at the base as well.