A single handprint, which, according to Ohio State University legend, cannot be scrubbed off.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

Medical history museum featuring a lovely doctor's office from the 1800s.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

An unoccupied lighthouse encased in layers of ice from the waters of Lake Erie.

A 2,000-year-old Adena burial mound located along a busy street in Columbus, Ohio.

Known locally as "the giant head," this 14-foot LED sculpture has a photo booth in the neck where you can have a 3D picture taken and displayed.

This whimsical campus lawn is dotted with large sculpted numbers and hidden mathematical formulas.

The entrance to this sinisterly named tunnel hides behind a Tim Hortons.

An unassuming 13-acre park is home to over 12,000 roses.

A bronze of the man in all his sinewy glory celebrates his longtime connection to the Ohio city.

Inside a former cabaret, seven floors of erotic art.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Skeletons, medical artifacts, and other obscure and precious treasures all displayed in a wooden pharmacist's cabinet.

The curious underground history of keeping Paris clean.

This underground transport hub doubles as an art gallery.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Former hunting lodge of a duke who was an avid collector of impressionist works.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

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

Museum on French naval history, with magnificent figureheads, a historic diving suit, and a boat used by Napoleon.

Hidden away in a modern library are the remains of one of the 18th century's most celebrated wunderkammers.

Collection of antique taxidermy and natural specimens, near one of Paris's oldest flea markets.

Once a 19th-century brasserie, this McDonald's exterior celebrates Alsatian design and the "King of Beer."