The "Great Bath" at the site of Mohenjo-Daro in modern-day Pakistan was most likely the first swimming pool, dug during the 3rd millennium BC. Ancient Greeks and Romans built artificial pools for athletic training, for nautical games and military exercises.
Here is collection of some private indoor and outdoor swimming pools from all over the world.
And what could be more suitable for such a daydream?
Perfect view!
Would you swim every day if you had a pool like that?
Incredible swimming pool with a little island in the middle.