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

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

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.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The yawning maw of this pagan visage is said to bite off the hands of liars.

A former telephone box found new life as a photo booth and charity fundraiser.

These tiny effigies are believed to represent victims of Edinburgh’s notorious Anatomy Murders.

Huge winged monument in the United Kingdom.

The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

A 19th-century pharmacy converted into a bookstore.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

An underground city beneath Krakow's postwar socialist utopia.

In the midst of a living monument to Soviet social engineering, Polish Catholics built this church by hand.

A collection of modern and vintage pinball machines housed in the cellar of a 15th-century building.

At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

Inside this Krakow church, an explosion of psychedelic color.

A memorial to the beloved brown bear that served in the Polish army during World War II.

This man-made mound monument was built out of soil from all across the Polish empire.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

So opulent and massive it was once dubbed a palace, this hotel's doors closed temporarily in 2007 and failed to reopen.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

A small island dotted with old, historic Finnish buildings.