This modest marker near Notre Dame identifies the very center of Paris.

There has been an astronomical clock on this spot since the 14th century.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

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

A beautiful Victorian statue shows France's enduring love of the rhinoceros.

This emotive sculpture was originally created for the 1878 World's Fair.

The world's first successful water-powered cotton mill paved the way for the factories of the British Industrial Revolution.

This petite cutlery factory sits on the foundations of a defunct gasworks.

A headstone notes where the most famous of Robin Hood's legendary Merry Men is reportedly buried.

Seat of the Duke and Duchess of Devonshire for centuries.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

Stockholm's tiniest statue is of a small boy looking at the Moon.

One of the world's first dedicated bank buildings in the world is now the oldest one.

Real bones which are said to have belonged to a Polish dragon.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

Not far from the more famous House of Juliet, visitors will find the supposed residence of her lover.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

This seasonal soft serve shack has been doling out silky swirls since 1951.

For decades these polar bears have roamed all around a Nashville neighborhood.

Flaunt your karaoke chops at this pitch-perfect dive bar.

Banksy's image of a naked man dangling from the window of a sex health clinic.

England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.