Besides being home to cave paintings and pre-Columbian Cuban archaeological remains, you get to take a boat through this stalactite and stalagmite covered cave.

A portrayal of two lamps embraced and in love.

This stone in Lake Geneva was once the reference point used to determine altitude in Switzerland.

These abundant, over-the-top monuments are so widely scattered that they define the entire compact capital cityscape, often leading to jokes about whether there are more statues than residents.

The holes in this wall provide a glimpse into Jewish life in Budapest, both past and present.

A triumphant marble and bronze fountain depicting a 15th-century Hungarian king and his hunting party.

This tiny chapel withstood a massive mudslide and flash flood.

The lead horse on a Disneyland merry-go-round that is older than the park itself.

The metal leaves on this tree are engraved with the names of Holocaust victims.

Inspiration struck on this seat outside the Griffith Park merry-go-round.

A diminutive statue that was inspired by the sculptor's own daughter.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

King Carlos IV laid the first stone during construction of this chapel.

Outside of one of Britain's most renowned social clubs, a step installed specifically for the Duke.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

Inside this Krakow church, an explosion of psychedelic color.

Heralded as the oldest statue in London.

A public work of art that also provides some relief from the summer heat.

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

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

An agreement meant to honor the Duke of Buckingham led to this unusually-named passageway near Charing Cross.

A glimpse at Walt Disney's vision for a "community of tomorrow," in miniature.

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

A pair of club-wielding guardians stand watch over London's first public clock to feature a minute hand.