where was the first swimming pool built?

Answer 1

That would be The Sumerans around the Egyptian locale.
Aound six thousand BC (bce) if you are looking ancient age?

Answer 2

Swimming as an organized activity goes back as far as 2500 B.C. in ancient Egypt and later in ancient Greece, Rome, and Assyria. In Rome and Greece, swimming was part of the education of elementary age boys and the Romans built the first swimming pools (separate from bathing pools). The first heated swimming pool was built by Gaius Maecenas of Rome in the first century BC.
However, swimming pools did not became popular until the middle of the 19th century. By 1837, six indoor pools with diving boards were built in London, England. After the modern Olympic Games began in 1896 and swimming races were among the original events, the popularity of swimming pools began to spread

Answer 3

The history of pools begins at the "great bath" constructed at the site of Mohenjo-Daro. It was most likely dug during the 3rd millennium BC. The pool, twelve by seven meters, is lined with bricks and during its time the pool was covered with a tar-based sealant.
Artificial swimming pools have also been built by the ancient Greeks and Romans who used them for athletic training in the palaestras and also for nautical games, and military exercises. Roman emperors had private swimming pools in which fish also were kept, hence the Latin word for pool, piscina.

Ancient Sinhalese built what is known as "Kuttam Pokuna" a pair of pools in the ancient kingdom of Anuradhapura, Sri Lanka (4th Century BC). Such pools were decorated with flights of steps, punkalas or pots of abundance and scroll design.

Modern-day swimming pools did not became popular until the middle of the 19th century. By 1837, six indoor pools with diving boards were built in London, England.

Answer 4

Antarctica