This historic tower in the California desert promises visitors a "vortex of good vibes".

A Wild West jailhouse that slid down the mountainside.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

Since World War II people have been decorating this stretch of the Yuma desert with signatures arranged out of rocks.

Collection of vintage trailers double as hotel rooms.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.

From Nunavut to Tierra del Fuego, you won't find any lighthouse higher than this one.

A gorgeous gem on the ocean.

A beautiful waterway tucked in the corner of a power plant.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

This lighthouse was witness to the end of WWII hostilities and now collects creepy cairns.

Only a shrine remains at the site of the catastrophic nightclub inferno that killed 100 Great White fans.

Steepest flood safety railway in the entire world.

Memorializing an American tragedy of massive proportions.

The last holdout of a pre-Civil War rebel who took the matter of slavery into his own hands.

A star fort along the C&O Canal in western Maryland that protected America in three wars.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

An homage to everyone's favorite prehistoric cartoon family.

The highest bridge in America was built for an almost unnervingly small amount of money.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.