[1][2] It was originally the site of Ingersoll Park where a baseball field was built[3] and became known as Twickenham Park, for the neighborhood that developed around it, until the natatorium was built.
[4] It used heated saltwater from the Spokane River.
The song "Dear Old Nat" by A. D. Scammell was written about it.
The site is now a trailer park.
[5][6] KSPS aired the documentary Remember When: Nat Park in 1996.