Britain's answer to the NSA is based out of this deliciously-named circular headquarters.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

The house where John Wilkes Booth conspired with his co-conspirators.

Giant acorn-shaped 19th century gazebo from which suburban Washingtonians gazed upon the original "silver" spring.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

Alleyway plaque commemorating the death of a fictional character in The Maltese Falcon, not far from the author's home.

There aren't too many operational funiculars around, but Pittsburgh has two!

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

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

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

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

One part local history, 99 parts gruesome haunted house.

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

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

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Wedged between two sets of row houses is an awkwardly located family graveyard.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

The likeness of the Baltimore music icon was unveiled in time for the anniversary of his Senate hearings on music censorship.

Once America's tallest structure, now a Baltimore landmark.

The design of this historic domed church was influenced by Thomas Jefferson and intended as a statement of religious freedom.

This simple convenience store sits on the location where the Ouija board was named—and has a plaque to prove it.

Walk through the history of American pop culture.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

This free, take-a-book shop seems like a trick but isn't.