This remains my favorite proposal for the reuse of the High Line - a mile long lap pool. Nathalie Rinne, an architecture student in Vienna submitted the plan and as part of our 2003 Ideas Competition .
The simplicity of the idea, the singularity of use and the graphic way in which it was conveyed made it the favorite of the jury  and one of four winners of the competition. I think the David Hockney swimmer helped also.
Earlier: Swimming Pools Part I