Locals believe the purity of this huge, untouched Arctic lake could be the salvation of human civilization.

This oddly named town refuses to change its phallic moniker.

A monument marks the beginning of the longest north-south road in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

A haunted hill that supposedly defied gravity.

Four-story concrete hotel never opened to customers.

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

During the summer, surfers in Alaska take advantage of this inlet’s unusual water patterns.

This revered mutant tree was felled in an act of ecoterrorism leaving a legacy of myth and possibly murder.

The stunning remnants of this wreck emerge from an otherworldly backdrop of rainforests.

Roadside collection of 65,000 signs.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

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

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