Giethoorn is a village in the Dutch province of Overijssel. It's known as "Venice of the North" or "Venice of the Netherlands". There are absolutely no roads and all transport is conducted by water over one of the many canals.
The deepest pool in the world, named the Y-40 Deep Joy, the pool is now the star attraction at the Hotel Millepini, located in the Montegrotto Terme resort area, near Venice. Reaches a depth of 42 meters (138 feet), a space that could easily accommodate a 13-story building