The Piscine Molitor is an abandoned swimming pool complex in Paris built in 1929 and classified as a French monument. It is known for its Art Deco design and for being the site where the bikini was first introduced in 1946. The complex has fallen into disuse and ruin over time. It has an indoor pool that is 33 meters long and an outdoor pool that is 50 meters long, making it an Olympic size pool.