The Aquatic Park Bathhouse Building, today part of the Aquatic Park Historic District in San Francisco, is a four-story reinforced-concrete structure built in the late 1930s. Its design belongs to the "Streamline Moderne" style, deliberately evoking the appearance of a large ship at dock. The building’s main block is rectangular with semi-circular ends, upper floors are stepped back, horizontal emphasis, rounded corners, porthole-like windows, ship-type railings and steamship-style roof ventilators reinforce the nautical impression.
The bathhouse was originally painted white, with red-tiled roof terraces on the upper levels. Inside, the main lobby is adorned with colorful, marine-themed murals by the artist Hilaire Hiler, and the flooring and finishes combine terrazzo, marble wainscoting and steel doors with brass fixtures shaped like halves of ship’s wheels, all contributing to a cohesive maritime-inspired aesthetic.