Swimming Pool

Swimming pools are manmade structures filled with water that are large enough for anyone to swim inside. They can be built into the ground, above the ground either as part of a building or a structure on their own, part of a cruise ship or inflatable containers which are portable.

History
The first swimming pool to be built was said to be in Pakistan during the 3rd millennium BC. Much later, Romans and Ancient Greeks built them not just for leisure but exercise as well.