Alaska holidays embrace the extreme. The USA’s highest peak, Mt. McKinley, is located in Denali NP. It’s home to the largest national park in the USA, Wrangell–St. Elias, at over 32,000 km². And much of it is only accessible by boat or plane. Go glacier climbing, kayak through fjords, hike the tumultuous taiga and sub-arctic tundra with resident wildlife wonders such as whales, grizzly bears and wolves. But just go.