This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

In the center of Wrocław's old meat market stands a somber tribute to the city's livestock.

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

This elaborate hole in the ground was built as a sacred site for an ancient civilization.

This one-of-a-kind archeological site is home to strange prehistoric ruins, the original use of which is still a mystery.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

The most loyal of little dogs, or a Victorian era publicity stunt?

A six-ton wedding present for the King of the Scots.

The colorful stairs are made with marble from the world's major quarries.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

One of Edinburgh's oldest pubs hides a 19th-century skittles alley in the back.

Now home to a drinking establishment, this building has a macabre history.

This small museum in a 17th-century building honors three iconic Scottish writers.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

Before there were doorbells this bronze ear was installed for visitors to announce their arrival.