It's beautiful, it's haunted and its claim to fame is that it's the oldest existing stone arch bridge in Australia.

The oldest military monument in the United States.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

Take a step into the workshop where Edison and his employees revolutionized the world.

Thomas Edison's home and final resting place also boasts an impressive garage, where some of the earliest electric cars are on display.

Thirteen pastel palaces in downtown Charleston add a gorgeous splash of color to the city.

A spectacular tribute to statesman and philanthropist Andrew Mellon.

A remarkable feat of Victorian engineering across the Firth of Forth.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

Once considered a marvel of engineering, this 107-mile canal played an integral role in building New York City.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A historic landmark and museum filled with curious objects representing the history of Key West.

One of the oldest active carousels in the country—but it might be missed by all but the keenest-eyed boardwalk strollers.

Constructed on the ruins of a convent, this tower saved countless lives.

Now home to a drinking establishment, this building has a macabre history.

A historic observatory precariously perched at the "Top of Europe."

The site of the notorious Camp Sumter Prison is now a peaceful memorial.

Once forgotten, this strip of sand was a rare beachside haven for Black Americans in Atlantic City.

This statue pays tribute to the iconic musician in the place where he recorded his final studio album.

A trompe-l'oeil statue honoring the first guide dog in North America.

This exhibit allows visitors to wander through the interior of a replica Ice Age glacial cave.

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

Chelsea's soldiers were given strict orders when crossing this historic bridge.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.