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

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

An old train trestle re-imagined as an Egyptian obelisk.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

A tribute to the intrepid explorer and his crew who perished in terrible conditions on an ill-fated expedition to the Arctic.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

Corn-inthian columns with a uniquely American take on neoclassical architecture.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Eduardo Kobra’s breathtaking 32,300-square-foot graffiti wall took over Rio’s Olympic Boulevard.

Two stone columns flank the grand Venice square, but there were supposed to be three.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

The sculptor was instructed to add “stallion attributes” to the general's bronze mare.

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

At just 51 feet and 10 inches long, it's the shortest street in England.

An ear-piercing buzzer calls lawmakers to a vote with a series of long and short rings to form coded messages.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

The cedar tree in Highgate Cemetery earned its title by accident.

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

All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

The sister plane of the C-123 shot down during the Iran-Contra Affair has found a new purpose in retirement.