Holland America Line's CruiseTour to Denali overview. In Anchorage, board the luxurious, award-winning McKinley Explorer, Holland America's private fully domed rail cars, the world's largest passenger train cars. Journey 245 miles north to Denali National Park & Preserve, one of those "Best Places." Crowning the park is 20,320 foot tall Mt. McKinley, the tallest mountain in North America. At its feet lives one of the largest concentrations of wildlife anywhere in the north. On the Tundra Wilderness Tour, spot 71% more wildlife than on the Natural History Tour offered by other lines; Dall sheep, moose, mountain goats, wolves, caribou and the grizzly bear. 14 itineraries offer "Double Denali," an extra day at Denali National Park. www.hollandamerica.com