This 16th-century pole was once used in brutal public executions.

The location of this small park was once the site of an infamous public morgue.

The largest and best-preserved rotunda in Prague.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

The first museum in the world devoted to sexual gadgetry.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

Macabre astrological automaton clock dating to the late 1400s.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

Two stunning 17th-century libraries and a cabinet of curiosities.

Somber memorial to the May 10, 1933, book-burning which took place on this spot.

Featuring the largest CinemaScope screen in Pennsylvania, this drive-in has entertained moviegoers for more than half a century.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

This statue of a Hindu cosmic dancer at CERN is a metaphor for modern physics.

Large Hadron Collider and the Birthplace of World Wide Web.

A museum dedicated to Norwegian music, old and new alike.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

The castle still holds traces of the abandoned Roman fort it was built atop.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Europe's second largest ossuary wasn't discovered until 2001.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

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