A beautiful but toxic fountain of mercury.

This 16th-century cathedral clock was recently repaired after centuries of neglect

Touching the iron railings of Tarragona's balcony to the Mediterranean is said to bring good luck.

Long tunnels run under the ancient chariot racing circuit to the tower.

This Roman arena once played host to bloody gladiatorial battles.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

A fantastic Christmas tradition where defecation meets the manger.

The unexpectedly beloved remnants of a controversial thermal power plant.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

An icy lake tucked among jaw-dropping alpine panoramas.

A plain wooden seat that once belonged to one of the most prominent figures of the Protestant Reformation.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

A rare, flower-shaped example of Brutalist architecture in Switzerland.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Designed by Maya Lin, the memorial honors 41 individuals who died fighting for equal rights between 1954 and 1968.

The oldest family-run restaurant in the United States is a living museum of New Orleans dining history.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

A sharp bend in a dramatic river canyon cut through red rocks.