This popular pitstop lives up to its name.

More than 25 fully functional scale replicas of famous lighthouses dot the shores of Lake Havasu.

An ancient cave system in Tennessee’s Appalachian foothills converted to a 1,200-person music venue.

A once-groundbreaking power plant turned into a hotel and mini-museum of archeological and geological wonders.

Experience the glam side of air travel without leaving the ground at this speakeasy.

The last SR-71 ever constructed.

An antique Beechcraft airplane serves as a giant windsock for people driving through the blustery open country of eastern Wyoming.

This lakefront cottage was crafted in the 1800s and was once a sanitorium.

This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations

The largest collection of historic military firearms in the United States.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

The Bong-area park police have asked visitors to please, stop stealing the signs.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

Over thousands of years, this slot canyon was carved out of the bed of an ancient lake.

The oldest continuously-operating tavern in Wisconsin used a clever loophole to serve alcohol during Prohibition.

This massive airship factory is so large that it has its own indoor weather.

One of the last surviving C-97s sits in a field in front of a Wisconsin inn.

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

The Bucyrus-Erie model 1850B electric shovel, or "Big Brutus," the largest existing electric shovel in the world.

The "lovely red Vega" of the legendary record-settling pilot.

Home of Howard Hughes' Spruce Goose.

The wooden airship was the largest flying boat ever built.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

Largest man-made excavation on earth!