The largest swimming pool in the world is the San Alfonso del Mar seawater pool in Algarrobo, Chile. It is 1,013 m (3,324 ft) long and has an area of 8 ha (19.77 acre), it was completed in December 2006.

wow that is one big pool! I would love to have a pool like that! I wonder how many people it can hold, or how long it took to make?