This unique rock formation is quite the local celebrity, although one day it may come crashing down.

Marvel at this massive waterspout fueled by the incoming tide.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

A former 16th-century monastery houses a museum dedicated to the island and its culture.

The oldest Marian image in the Canary Islands still impresses people nearly half a millennium later.

These wooden balconies that are both decorative and functional.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

This 15th-century structure had a long, tortuous journey to its current location.

Inside this cathedral is a shoulder bone belonging to the Patron Saint of Scotland.

An artist's whimsical transformation of everyday objects.

This mundane post marks the old location of the city's main postal hub.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

These wooden pipes were crucial to providing water to Medieval Edinburgh.

A Roman spa buried deep beneath the City of London.

At almost 1,000 years old, this is the oldest known door in all of Britain.

The rose garden in Regent's Park where Pongo and Perdita met for the first time in Disney's "101 Dalmatians."

This overlooked street light once served as a KGB dead letter box.

Eighty million natural history specimens call this gargantuan museum home.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The only statue ever crafted by award-winning animator Ray Harryhausen.

Remnants of the Roman empire's northern frontier nestled in suburban Glasgow.

Water-themed sculptures guard this unusually square structure.

This small memorial honors a ferocious feline and local hero.