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

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

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.

Considered by many to be one of the most dangerous highways in Alaska.

This abandoned mine offers a glimpse at what life was like for those who came to Alaska seeking Gold Rush riches.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

This geothermal hot spring hides beneath a slowly growing mineral dome.