One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

The final resting place of a poisoned lover whose death was at the center of one of Glasgow's most sensational murder trials.

Morocco’s modern capital was once a haven for Barbary pirates, who went so far as to establish a republic of their own.

Cycle the solar system—from the sun to Pluto—right here on earth.

England's largest white horse isn't even white.

Lewis Carroll's White Rabbit or something else altogether?

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

Rock-cut cave complex filled with ancient Buddhist artwork.

The oldest standing concrete bridge in England was also constructed as a work of art.

These artifacts were discovered during the construction of the airport, with some dating back to the Neolithic period.

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

The spot where Oxford garnered its name was also home to a medieval philosopher and includes a house covered in statues.

Many of Edinburgh's more unsavory characters spent their final days behind this door while awaiting their executions.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

Possibly the world's smallest museum is home to one exhibit that sheds light on the capital city's dark criminal history.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

This may be the last of London's wooden pavements, which were once a common sight in the city.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

A Byzantine-era church hidden in a wooded area below the Acropolis.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.