The Huey P. Long Fieldhouse was completed on the LSU campus in 1932. Hearsay says that Huey Long intended it to be the biggest pool around, longer than any run-of-the-mill Olympic-sized pool. It was designed by Weiss, Dreyfus and Seiferth, the same firm that designed the new state capitol.
UPDATE: This originally said "old state capitol" and a few commenters pointed out that I had my information wrong. Please forgive this damned Yankee.
Until the 1970s, it was required that every LSU student take a swim class, but by then the pool was already in decline. It has been closed since approximately 1999 and has been silently crumbling ever since, relatively unnoticed amidst the thriving campus.
In early June, I was allowed access to the condemned structure housing the pool *with police escort.* Gotta say, I love having a police escort. They can escort my scared ass any time around abandoned buildings.