This London plaque marks the spot where David Bowie's famous alien made his debut.

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

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

Charles Dickens described the concert room in this amazing Victorian hall as "the most perfect room in the world."

Most of Britain's gold reserve was secretly stashed here after the start of World War II.

A hundred copies of Antony Gormley's naked body stare out across the water.

Much of what constituted mid-century Liverpool now litters a beach outside of town.

The tower was originally used as a chimney for the waste incinerator of St. John's Precinct and Market.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

The red letters in the literary pavement leading to the library form a mysterious code.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

Craggy concrete faces are hidden in the walls of this artificial cave along the San Antonio River.

Houses are tucked between, on, and underneath giant boulders.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A derelict bit of infrastructure from the canal that once ran through D.C. is landlocked in the heart of the city.

There’s a special club house at the top for the bell ringers.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

At 207 feet, one of the world's longest continuous escalators.

This unique historical monument features large concrete spheres designed to resemble fallen stars.

This forgotten boat elevator was an engineering marvel in its heyday.

The flower-shaped temple in Virginia aims to transcend the boundaries of the world’s religions.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.