The SS Christopher Columbus was an American excursion liner on the Great Lakes, in service between 1893 and 1933. She was the only whaleback ship ever built for passenger service. The ship was designed by Alexander McDougall, the developer and promoter of the whaleback design. Columbus was built between 1892 and 1893 at Superior, Wisconsin, by the American Steel Barge Company. Initially, she ferried passengers to and from the World's Columbian Exposition. Later, she provided general transportation and excursion services to various ports around the lakes.