The pool constructed on the customary site of a rugby pitch measures 2.2 meters deep, or roughly 7-feet-2, which means French basketball star Victor Wembanyama could comfortably stand in it.

The pool at Paris La Défense Arena is 2.15 meters deep, slightly less than the depth of the pool at the 2020 Tokyo Games. Swimmers tend to prefer a deeper pool because it generally results in ...