Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

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

A hands-off space for graffiti artists to hone and display their skills.

A sweet symbol marks the place where torturous executions were once carried out.

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.

Hear the quietest sound from across the dome.

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

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

This pedestrian walkway cuts through a cemetery and over several burial vaults.

The site is dedicated to an investigative journalist whose murder triggered a political uproar that changed Slovakia forever.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

From atop a hill at the center of Cape Town, a cannon has been signalling the time since 1806.

A Latvian rescuer who saved countless lives during World War II.

A ferry has operated across the River Hamble for around 500 years, but its distinctive bubblegum pink is a more recent addition.

Small sculpted heads of prominent phrenologists mark the outside of their former headquarters.

Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

The world's most active stratovolcano is almost always erupting.

Once designed as the entrance to Buckingham Palace, this structure was later relocated and stands as a victory arch.

A set of outdoor stairs named in honor of a famous Austrian artist.

On a remote footpath and surrounded by beautiful Sussex countryside sits Sussex’s smallest cemetery.

A beautifully eclectic mix of architectural styles.

The former headquarters of history's oldest megacorporation.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.