Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

Macabre astrological automaton clock dating to the late 1400s.

Old Danish castle immortalized in Shakespeare's Hamlet.

France's most famous cemetery, with some of its most curious tombs.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

Pilgrimage site for star-crossed lovers.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

The final resting place of the poets Shelley and Keats.

A Hungarian optometrist's charming collection of Asian art and curiosities.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Elaborate tile work in this railway station tells the story of Portugal.

An ancient Egyptian temple in the middle of Madrid, Spain.

Da Vinci's equestrian statue, 500 years in the making.

This small chapel is built of human bones and decorated with a golden skeleton.