This 19th-century building inadvertently preserved the handprints of its builders within its walls.

While knives are the main feature in this store, visitors will also find dinosaur bones and meteorites.

Built to replace a house destroyed by a hurricane, this home is made entirely of shipping containers.

One of the oldest, tallest, and most haunted lighthouses in America.

A tribute to Ponce de Leon's supposed quest for eternal youth.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

A monument celebrating the idea of reaching inaccessible places.

This liminal destination combines creaky carnival rides, a classic car museum, and luck-of-the-draw flea market finds surrounded by dust and drive-in movie screens.

These constructed wetlands naturally filter millions of gallons of treated wastewater every day.

Grab a slice of pizza next to the remains of the "human monkey" who ran for mayor.

This 25-foot tall clock tower commemorates the start of one of America's foremost shopping districts and the end of the historic Palm Beach Pier.

A building so large that it has its own weather.

The remnants of the fortress that saved Georgia from the Spanish still stand guard on their swampy island.

Georgia's first brewery is also one of its oldest surviving buildings.

If all members were present at the table, a sixth of the world's wealth would be under the same roof.

Ruins of a Carnegie family mansion on Cumberland Island.

Used as a military post in three different engagements, this fort has remained incomplete and unfired upon for nearly 200 years.

The legacy of baseball great Roberto Clemente is preserved in a retired Pittsburgh fire station.

Within this beautiful Pittsburgh cemetery, a unique headstone bears witness to one man's eternal love for Jaws.

This public park was the site of the largest civilian disaster of the Civil War.

An imposing pair of sphinxes stand guard outside this Egyptian Revival tomb.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

In what is rumored to be an intentional act of spite, this memorial almost completely obscures the nearby grave of a senior officer.