This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

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

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

The northernmost truck stop in the United States.

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

The "Gateway to the Arctic" connects Barrow's indigenous population with the sea and its traditional industry: whaling.

This general store is a one-stop-shop for workers at the Prudhoe Bay oil field.

In the 1950s, two women saved this grand theater in the Colorado mountains from demolition.

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

This constitutionally sound Muffler Man harkens back to the days these attractions were a must-see.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

The Grand Canyon of Texas.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.