San Alfonso del Mar resort in Algarrobo, Chile | Travel | guardian.co.uk
This link is for the worlds largest swimming pool, certified by Guinnes. I guess the size of this thing puts an end to the debate about which one is really the largest. ( I know there was one thread about this some time ago, but I couldnt find it). Anyhow, this would be the solution for DYN competitions in a straight line: it is more than one kilometer long!.
