This grinning pup statue is all that's left of what was once a ubiquitous Bay Area diner chain.

A 15th-century former coaching inn forms the implausibly grand entrance to a 1980s shopping mall.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

An architectural oddity hides in plain sight on this iconic London bridge.

The world-record holder for the longest bridge stretching continuously over water.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

This magnificently macabre shield shows the power of chivalrous love in medieval times.

"We gonna rock down to Electric Avenue, and then we'll take it higher..."

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

These 90-year-old murals of local kings, Vikings, and outlaws hide in plain sight in a beautifully baroque shopping arcade.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This symbol of peace is appropriately positioned overlooking the Pacific Ocean.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The oldest of the three remaining bridges in England with buildings on top of them.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

A curious urban windmill once owned by a renowned British mathematical physicist.

The Birthplace of the Englishman who founded the A.C. Milan football club.

The bones of two medieval royal lions were discovered at the historic fortress.

This museum inside a museum tells the story of London's timepieces.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

An incredibly well-preserved piece of ninth-century Viking poop.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.