Millions of years of oxidation make a drive down this winding Death Valley road surprisingly colorful.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

Ten 25-foot-tall, beehive-shaped kilns, abandoned in Death Valley.

"Only the devil could play golf here."

The location of the last stand of Charles Manson's doomsday cult.

One of the most unusual geological features, recognizable from a dozen hit movies.

Where NASA's satellites and rovers phone home.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

A memorial to the unknown and unheralded men and women of the Cold War military and intelligence services.

The secret city built by the Manhattan Project.

An American city stranded at the tip of a Canadian peninsula where strict adherence to the "49th parallel rule" became problematic.

Manhattan and the Bronx have been playing tug-of-war over this former island neighborhood for more than a century.

The only land territory disputed between the U.S. and Canada.

This protected area in Lake Huron contains some of the world’s best-preserved shipwrecks.

Each year melting snow turns these Austrian hiking trails into scuba zones.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

What was once a unique system of urban elevators is turning into a mechanical ruin.

No one knows who's responsible for decorating this tunnel with stuffed animals, but the people love it enough to protest their removal.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

A rare water-powered funicular, it uses a huge tank of water and gravity to do its work.

For just a few bucks, this Iowa funicular will let you feel like an 1800s fat cat.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

There aren't too many operational funiculars around, but Pittsburgh has two!

Historic funicular railway, believed to be the shortest railroad in the world.