Neptune and Roman Pools, Hearst Castle, San Simeon, California

Encino, California

Pool postcard: Hot Springs, Virginia

Pool postcard: Call of the Canyon Resort, Oak Creek Canyon, Arizona

Pool postcard: Fort McClellan, Anniston, Alabama

Pool postcard: The Plunge, Bella Vista, Arkansas

Pool postcard: University of California, Berkeley

Pool postcard: Fleischhacker Swimming Pool, San Francisco

Pool postcard: Santa Clara International Swim Centre, California

Pool postcard: Miami Beach Casino, Florida

Pool postcard: Bathing Casino, Palm Beach, Florida

Pool postcard: Municipal swimming pool, Griffin Georgia

Pool postcard: Mineral Springs, Pekin, Illinois

Pool postcard: Fort Scott, Kansas

Pool postcard: Western Kentucky State Teachers College, Bowling Green, Kentucky

Pool postcard: City Park, Belfast, Maine

Pool postcard: Ocean Park, Maine

Pool postcard: St Cloud, Minnesota

Pool postcard: Highland Park, Meridian, Mississippi

Pool postcard: Municipal pool, Grand Island, Nebraska