The Hyde Street Pier is part of the San Francisco Maritime National Historic Park at the west end of Fisherman's Wharf. There's a fleet of historic vessels at Hyde Street Pier and above Aquatic Park is the Maritime Museum.
Tote is looking at this ferry's enormous paddle wheel. The ferry is the Eureka, a vessel that was built back in 1890 as a rail ferry and rebuilt and refitted several times. (The National Park Service website)