This colorful gate stands as an entrance to the walled city of Old San Juan.

This beach pool offers a spectacle of crashing waves, blue hues, and a historical lighthouse.

Years of neglect and nature took a toll on this 19th-century lighthouse.

La Cara del Indio honors the Taíno chief who fought bravely against the Spanish invasion of Puerto Rico.

A park where people have been going to feed friendly pigeons since the 18th century

This limestone cave offers an incredible view of the Río Grande de Arecibo valley.

The world's second largest single-dish radio telescope, once used to contact E.T.

Coney Island’s last surviving haunted ride.

A wooden rollercoaster that still delivers a thrill.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

The mass grave of a heroic Revolutionary War regiment sits below an empty lot near the Gowanus Canal.

This 19th century wooden span is one of only four retractile bridges in the United States.

Lie in a hammock where George Washington stood.

Most historians agree that the so-called "Gentleman Pirate" wasn't much of either of those things.

A stack of stones steeped in Irish folklore, much like the hero they're connected to, hide in plain sight.

Once the most flame resistant building in the country, the South Carolina Historical Society building was almost burnt down in a fire.

Paths are maintained, but trees have taken over plots.

This cemetery holds the remains of an accused witch and the man that ensured her freedom.

One Brooklyn man's collection of life-size fiberglass statues has taken over his entire yard.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

Many of the murals covering this sleepy Florida town hide some sort of intentional error.

This century-old independent movie theater with an iconic Art Deco neon sign survived a devastating fire in 2016.

A mysterious air force base built to resemble a Long Island fishing village.