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.

An eerie reminder to the horrors of World War II.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

This statue is the only female representation of Rome's "talking statues."

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

This Underground station has been a popular filming location for decades, even before it closed.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

More than 250 sakes are available in an izakaya hidden in the basement of a Midtown office building.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.