Roads in Alaska

This mile marker stands at the unofficial end of a highway built to defend the United States from a Japanese invasion during World War II.

This gravelly, dangerous highway is the only road in the United States that leads to the Arctic Ocean.

The stickered marker pinpoints where the only maintained road in the United States crosses into the polar region.

The northernmost international land border crossing in the United States.

A suburban street in Anchorage doubles as a runway, and each home has its own airplane hangar.

Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.