It's twice the size of Texas, features 16 of the 20 tallest mountains in the nation and is home to the biggest earthquake of the 20th century. Everything about Alaska is larger, tougher, and more extreme than any other state. This breathtaking two-part journey soars over its one-half million square miles of winter wonderland and shows why countless adventurers have come to the 49th State over the centuries in search of gold, silver, mountain-peak views, dog-sledding glory, and more.