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

The second-longest pier in the U.K. stretches a whole kilometer into the Irish Sea.

This network of narrow, medieval passages has the most delightful name.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Follow the original medieval paths that wind through this intriguing section of the city.

One of the shortest streets in York has an especially odd name.

The western face was supposedly left clock-less to snub the Welsh.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

This museum dedicated to the famous comedy duo is located in the town where Stan Laurel was born.

Poetic, metallic giraffes adorn a square off an Edinburgh thoroughfare.

360° views of the city plus five floors of optical illusions and hands-on science.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

A six-ton wedding present for the King of the Scots.

The final resting place of soldiers' loyal canine companions.

The much-beloved mascot of a local museum.

The curious and tiny collection contains some very odd objects.