Electric Mountain is a unique facility located in North Wales, designed to generate electricity using the power of water. It is built inside a former slate quarry and utilizes a pumped storage system, where water is stored in a reservoir at the top of the mountain. When electricity demand is high, the water is released to flow down, turning turbines that generate power. The facility can quickly respond to changes in electricity demand, making it an essential part of the UK's energy infrastructure. It can provide up to 1,800 megawatts of electricity, enough to power millions of homes during peak times.