caption: Slide 3 of 51: Wrangell-St. Elias National Park shows that size does matter. The same area as Yellowstone and Yosemite national parks and Switzerland combined, it rises from the ocean all the way up to 18,008-foot-high Mount St. Elias. Peak after mountain peak, massive ice fields, glaciers, abundant wildlife and more reward trekkers who make the difficult journey to reach the park.