What is the 73 meter waterfall called that James joule used?

The 73-meter waterfall that James Joule used for his experiments is called the "River Dee Falls." Joule conducted experiments on the conversion of potential energy to kinetic energy by measuring the temperature change in water when it was driven by the waterfall's energy. This work contributed significantly to the understanding of energy conservation and Joule's formulation of the first law of thermodynamics.