Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."

The attic of a four-century-old canal house hides a clandestine church.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

Anatomical cabinet holds unexpected treasures.

Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

One English town's celebratory landmark spurred more trouble than anticipated.

Henry VIII's forgotten castle was built by the gunpowder-obsessed king to be defended solely by cannons.

This strategically placed hill fort has served defensive forces from the Iron Age up until the 20th century.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A pub that is literally in the middle of nowhere, but continues to do business.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A collection dedicated to the treatment of disease, held in London's oldest hospital.

The remains of Crystal Palace Great Exhibition of 1851.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

The largest greenhouse in the world is home to over one million types of plants.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

400-year-old garden, restored to beauty.

Catacombs turned marketplace.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."