This beautifully situated lakeside Roman settlement was likely built during the reign of the Emperor Hadrian.

A defensive structure built during the Hundred Years War has remained useful in one way or another for nearly 700 years.

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

An anti-tank graveyard in the English countryside.

Europe's "only museum dedicated to the decapod" is full of quirky and absurdist displays, including one featuring the "famous" Giant Crab of Margate.

One of England's most famous churches hides a pair of little known architectural treasures.

At just 25 inches at its narrowest point, it's one of the tightest streets in the world.

Old Tudor home moved on thick iron rails to a new spot.

Isambard Kingdom Brunel, one of the great Victorian engineers, was the driving force behind the short-lived atmospheric railway.

Two women with a flair for both adventure and artful clutter created this singular round home.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The very first subway station in New York City is beautiful, decked out in chandeliers, and ... abandoned?

Ancient human remains unearthed around the iconic monument.

The first archaeological site discovered by aerial photography.

Famously misunderstood wonder of the ancient world

Set amid the remains of a secret WWII airfield, this barn was preserved as a memorial to Allied agents who parachuted into Europe.

Now a memorial to merchant sailors and Titanic victims, this medieval church was destroyed by bombing raids in 1940.

The bombed out remains of the old church were kept intact next to the new one, as a reminder of the futility of war.

The world's first purpose-built motor racetrack was destroyed by the outbreak of two world wars.

When methane gas started seeping up from the ground, they picked up and moved the entire town.

This restored 17th century "conduit house," often mistaken for a watchtower, actually supplied water to nearby Bolsover Castle.

Semi-precious Blue John stones have been mined in this cavern system for centuries.

This chain of artificial lakes was an ideal test ground for the aircraft that would carry the "bouncing bombs" used by the WWII "Dambusters" squad.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom