The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

Yo, Adrian!

World's first "penitentiary," meant to be humane, drove men insane.

This zombie-themed restaurant stands out in the heart of corn country.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

A half-size replica of the World Trade Center towers above Tulsa.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

This abandoned, windowless concrete block is one of the strangest buildings in Tulsa.

An acoustic anomaly with a mysterious cause.

In this small Phoenix taxidermy emporium, you can find everything from a squid in a jar to a freeze-dried toad.

A layered tribute to the work of mosaicist Isaiah Zagar.

This elaborate towering structure was once famed for its revolutionary height.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This downtown Dallas art installation is always on the lookout.

The world's tallest statue of an American hero.

Outposts of this restaurant chain were shaped like jaunty chapeaus.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

A snapshot of the city's fascinating voodoo culture.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

A monument to the egos of two railroad magnates that fell into decline along with their careers.

Miraculous tree that seems to sprout out of solid rock.

One of the smallest towns in the United States.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.