A crumbling hospital from the 1850s on Roosevelt Island.

A Circus legend leaves an unexpected endowment.

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

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

When you can't get to the Pacific, just go to Florida.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

Lyon's miniature version of the Eiffel Tower was built as a statement in support of French secularism.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This small condiment museum makes all manner of mustards with a 200-year-old mill.

Each time a baby is born in Ghent, these streetlights flash in silent celebration.

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

The celebrated eyesore created by starry-eyed sweethearts.

The video game-themed street art first popped up in the French city.

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

The narrowest street in Paris.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A colorful piece of contemporary art cheerfully clashes with Lyon's historical architecture.

Monsters and miniatures are held in equal esteem at this wondrous museum.

Lyon, France is home to two remarkably preserved Roman theaters, one dating back to 15 BCE.

Hundreds of hidden passageways weave through the old quarters of Lyon.

This 14th century wine cellar is home to the oldest barrel-stored wine in the world.