This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

This iconic Peak District ridge was once one of the busiest roads in medieval Britain.

A seaside town with no sea in sight.

The wreck of a B-29 Superfortress now stands as a memorial left in the moors.

At 1,732 feet above sea level, this spectacularly isolated yet surprisingly bustling bar is the highest pub in Britain.

These unique stepping stones hug a river's edge to take hikers on a journey through a limestone gorge.

The last of the 19th-century booze-free bars has been slinging teetotal tonics for over a century.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

The first archaeological site discovered by aerial photography.

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

Artists and musicians now rule over this former rail station.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Famously misunderstood wonder of the ancient world

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

A naturally mummified 2,000-year-old man.

Gothic tower where Lord Alfred Tennyson wrote the poem "The Sleeping Beauty."

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

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

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

A open air theatre built on a cliff by an eccentric British woman.