Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Go inside to really appreciate this 500-year-old technological masterpiece.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

This concrete sculpture features a woman opening her heart to showcase a beautiful fern.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Washington's iconic carousel has a nice piece of Civil Rights history.

Step inside Lucy, the world's largest "elephant."

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Believe It or Not, Ripley once called this chiseled mountainside “New York’s Mount Rushmore”.

The first and only carousel with a lineup entirely of insects.

Final resting place of Typhoid Mary.

Because holiday cheer is at its finest when it includes eerie mannequins, right?

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.

A century-old historical movie theatre that plays a mix of independent and mainstream films.

This stave church nestled in the Catskills was built in the 1960s by a community of Ukrainian immigrants and refugees.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

The abandoned ruins of America's first private zoo are open for exploration in the Catskills.

The first pet cemetery in the United States.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.