In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

Longest fortress system anywhere in Europe.

Where the lovelorn find a home for their sentimental keepsakes.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Bangkok's men with dangerous jobs come here in search of protective talismans.

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

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

Travelers leave tea kettles in a remote part of Death Valley as part of a mysterious, decades-old tradition.

The rocks in this arid basin leave trails of movement behind them.

This rock formation named for its unique shape is one of many that call the Alabama Hills home.

The southernmost point in the United States is a beautiful place to look at but a deadly place to wade in.

This black shoreline is made up of exploded lava particles.

A toxic ghost town sitting atop a massive coal fire.

"Only the devil could play golf here."

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

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

These unusual rooms on wheels are holdovers from the 1960s.

Exact replica of the ancient monument, but much, much lighter.

An off-grid art installation that encourages its visitors to imagine a world without waste.

A hand-built folk art installation covered with messages of God's love.

This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

There's an old indoor swimming pool hidden directly underneath the White House Press Briefing Room.