At the top of 360 feet tall Victoria Falls there is a natural rock pool, called Devil's Pool, where the water is relatively calm. From September to December, when the water level is low, you can swim in Devil's Pool.
Nemo 33 is the deepest indoor swimming pool in the world, located in Brussels, Belgium. Its maximum depth is 113 ft. It contains highly filtered spring water and holds several simulated underwater caves at the 10 metres ft) depth level. This is AWESOME!
KU DE TA Singapore is the coolest and stunning rooftop lounge and restaurant in the world. On the floor of the Marina Bay Sands Hotel & Casino SkyPark, features the most spectacular 360 degrees views of Singapore, including a beyond real infinity pool.