Avoid gangster interaction while window-shopping.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

An unassuming secret door once led to a legendary watering hole.

Discover the taste of mold.

This lower Manhattan bar is set up in an old bank vault that rests beneath a skyscraper that hides even more historic splendor.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

Once the most painted on object in the world, this short campus fence is well on its way to being so again.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

A beautiful oddities shop crammed with strange and morbid curiosities.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A hands-off space for graffiti artists to hone and display their skills.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

The canine-themed book collection claims to be Europe's largest dog library.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.