 Crowley Marine is a major private employer, supplying villages along the Tanana and Yukon rivers each summer with cargo and fuel.The City also attracts independent travelers with such attractions as the Alaska Railroad Museum, the Golden Railroad Spike Historic Park and Interpretive Center, the historical St. Mark's Episcopal Church (built in 1905), Iditarod dog kennels, and a replica of the sternwheeler "Nenana.