Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

This curious, round temple is the oldest still-standing marble building in Rome.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

Italian cave with exceptional acoustics and an unsavory history.

A Gothic cathedral created from volcanic rocks.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

An exercise in radical design and social living that became the epicenter of Soviet spy networks in London.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Eighty million natural history specimens call this gargantuan museum home.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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

A luxury hotel housed in a former 15th century Gothic church.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

The tallest mountain in mainland Netherlands isn't actually very tall.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

A beautiful maze marks where three countries meet.