The Alaska Highway, also known as the Alaska-Canadian Highway, was constructed during World War II and connects the contiguous U.S. to Alaska through Canada.
It took engineers less than a year to build this 1,397-mile (2,248-km) road from Dawson Creek, British Columbia, in Canada, to Delta Junction, Alaska (near Fairbanks) during 1942 and 1943.
They were in a hurry because a route was needed during World War II to transport military supplies to U.S. bases in Alaska.
A few sections of the highway are still gravel-surfaced today.
The Alaska Highway is often considered to be part of the Pan-American Highway, which extends south to Argentina.