Macabre astrological automaton clock dating to the late 1400s.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

For 150 years one family has been producing the iconic hot sauce on a bayou island made of salt.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

This otherworldly church spire reaches up toward the heavens.

One of few surviving standpipe water towers in the U.S.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

Not even a series of devastating fires could keep this odd castle in upstate New York from bouncing back.

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

Eight whimsical acres of metal art.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

A peaceful international sculpture garden in upstate New York.

An abandoned dollhouse factory.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

An old abandoned mining town in The Adirondacks where Theodore Roosevelt first learned of the shooting of President William McKinley.

One man's swirling six-acre monument of stone.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

"Gnome Chomsky" was once the largest gnome in the world, but is now simply tall for his kind.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.