A clock designed to run with perfect accuracy for 10,000 years.

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

Eighty million natural history specimens call this gargantuan museum home.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The curios of pharmacist and collector Henry Wellcome.

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

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

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.

One of the shortest streets in York has an especially odd name.

The oldest inn in England served brew to the crusaders.

The sign at the garden gate reads: "These Plants Can Kill."

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

360° views of the city plus five floors of optical illusions and hands-on science.

A 30-acre garden inspired by the principles of modern physics.