californiadiver.com/worlds-deepest-and-largest-indoor...l-planned-in-the-uk/

World’s Deepest and Largest Indoor Pool Planned in the UK

Currently, the world’s deepest swimming pool is the Y-40 in Italy which opened in 2014. At 131 feet deep (40 meters), it contains 1,136,000 gallons of water kept at a constant temperature of 90°F.

Now a new pool being designed in England is taking it one step further – or 33 feet further to be exact. The new 50-meter deep (164 feet) Blue Abyss pool will be able to run a crane and put caves and wrecks in the pool, and they will be able to change the lighting to be dark during the day or brightly lit at night, as needed. It will be used to train commercial divers…and much more.