Aquatic Park Historic District is a structural complex situated at the foot of Polk Street within San Francisco Maritime National Historical Park and is itself a National Historic Landmark declared in 1987.

Built originally as a public bathhouse in 1963, the district now includes a beach within the San Francisco Bay waterfront with a stepped concrete seawall, a horseshoe shaped municipal pier to the west, a grassy area known as Victorian Park which encloses the Hyde Street cable car turnaround to the south, concessions stand and stadia among others. It also houses the San Francisco Maritime Museum fronted by a manmade lagoon.

The Maritime Museum?s interior was decorated with extraordinary and interesting murals. The museum features the Steamship Room where the technological development of maritime power from wind to steam is illustrated, the displays of photomurals of the early San Francisco waterfront, lithographic stones, scrimshaw and whaling guns and a gallery used for exhibitions.