Over 500 boats and barges were built in The Pfohl Boatyard, including the largest steam towboat and the largest diesel towboat in the world. Watch as the crew launches a riverboat right into the waters of the Ice Harbor. Tour the towboat Logsdon, see huge steamboat artifacts, and climb on a raft in the children’s play area. The floating dock features houseboats, scientific vessels, and the traveling Audubon Ark.