The World's Deepest Swimming Pool

A cook called Richard Roos who poisoned the Bishop of Rochester ended up being boiled alive by Henry VIII. The size of your garden used to be determined by how far you could throw an axe in Wales. Do you guys know about the world's deepest swimming pool? I don't know about that either but it's a tunnel at the bottom and it's the depth of nine or ten double deck of buses - really cool.