DVD. PPI Group. 24 Minutes. Porthole TV explores the beautiful Great Lake Region, North America's fresh water jewel boarding several US states and the Canadian Province of Ontario. Also included is travel advice from travel professional, Mary Jean Tully and tips for cruising from Porthole Cruise Magazine`s Publisher and Editor in Chief, Bill Panhoff. The MV Columbus departs from Windsor while passengers gaze across the river to Detroit, Michigan. There are three choices of shore excursions offered and the fall is the best time for these excursions in Thunder Bay, Ontario, Duluth Minnesota, and Raspberry Island. Ports of call include: St. James, Milwaukee, Chicago, Mackinac Island, Ste. Marie, Huron, Perry Sound, Port Colborne, Erie, Thunder Bay, Milwaukee, and Raspberry Island.