Inside this museum you'll find models of ships that once plied the Columbia and Willamette. Also on display are early navigation instruments, artifacts from the battleship Oregon, old ship hardware, and other maritime memorabilia. The historic steam-powered sternwheeler Portland, moored across Waterfront Park from the museum, is also open to the public. Inside this old steam-powered paddle-wheel tugboat there are more displays about maritime history, and docents are on hand to answer questions about the boat itself.