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

This historic Benedictine monastery brews a booze so toxic that it has often been blamed almost singularly for Scottish hooliganism.

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

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

The most loyal of little dogs, or a Victorian era publicity stunt?

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

The largest greenhouse in the world is home to over one million types of plants.

A fantastic castle rumored to be the birthplace of King Arthur.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Legend says these rocks used to be hunting dogs, a story that may have inspired Sherlock Holmes' most famous case.

Ask nicely, and stewards of a centuries-old charitable tradition will give you free bread and beer.

The last living thing to come out of the rubble after 9/11 is now a symbol of hope and resilience.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

A bit of retro transportation flair preserved in the world's largest department store.

A popular European tradition makes its way to the states on one of America's most famous bridges.

One of only two commuter aerial tramways in the United States.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.