Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Elevated freight railway turned wildly successful urban park.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

The curious underground history of keeping Paris clean.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

From failed port town to Civil War fort, the ruins of this former defense saw their finest day in the television age.

An exotic reptile facility showcasing some of the rarest, most venomous snakes in the world.

An Irish Memorial commemorating those who perished due to potato blight.

This elaborate towering structure was once famed for its revolutionary height.

Fascinating town where normal life interfaces with the occult.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

One of Europe's oldest libraries.

J.R.R Tolkien, C.S. Lewis, and other "Inklings" met at the Oxford pub to discuss the now legendary fantasy stories they were writing.

This elaborate Byzantine-style building was designed for a not-so-pretty purpose.

A naturally mummified 2,000-year-old man.

London's smallest police station is barely the size of a phone booth.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

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.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.