Huge winged monument in the United Kingdom.

This disused Cold War bunker has been restored to all of its early 60s glory.

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.

Inspired by a dream, a hermit carved out a home in this sandstone bank to live a life of contemplation and prayer.

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

This abandoned gun tower was built to defend the River Thames from a French naval attack.

This crumbling folly looks like an enchanted left over from Middle Earth.

This 20th-century replica of a 13th-century castle has itself fallen into ruin.

You can crawl inside this atmospheric 5,000-year-old tomb.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

The remains of an ancient bathhouse sit inside this aptly-named pub.

This skewed English house has looked like it's going to fall over for centuries.

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

Accessible only at low tide, the deserted island is dotted with World War II ruins.

Wonderfully preserved Victorian factory, complete with a preserved steam powered engine house.

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

An incarceration museum on the spot of possibly the oldest prison in England.

The longest hedge maze in the world.

Catacombs turned marketplace.

Famously misunderstood wonder of the ancient world

Hidden beneath the streets of London is a secret subway that only carried mail.

Eighty million natural history specimens call this gargantuan museum home.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Astonishing rock formations dot the Brimham Moor landscape.