Viking. on the river to six by 2019, it said. Depending on the season, the cruises will go as far north as Memphis, Tennessee; St. Louis, Missouri, or St. Paul, Minnesota, the company said. Current. Sail through North America along the Mississippi River with a North America river cruise. North America river cruises reveal US history from the nation's. At Burkhalter Travel and our sister companies, Travel Headquarters, Olson Travel…