This octagonal cottage is the smallest and the oldest council house in the United Kingdom.

Shakespeare, David Bowie, Dr. Who, the Saxons, Druids and Romans are all claimed to have all made their mark on these massive man made tunnels.

Surreal riveted sea forts once protected the Kent shores from German attack.

This medieval church is the only one in the world that features all Marc Chagall stained-glass windows.

This oak sculpture at the edge of a small woodland is nine feet tall and shrouded in mystery.

No one is sure what to do with this WWII shipwreck that sits at the bottom of the Thames, still loaded with tons of explosives.

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

The last resting place of the famous Native American princess is marked by a haunting monument.

This former abandoned hospital, a complex of stunning 19th century buildings, once housed 2,000 psychiatric patients.

This 2,700-year-old woman is the jewel of the Maidstone Museum's Egyptian collection.

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

An anti-tank graveyard in the English countryside.

A set of medieval stained-glass windows tell the gruesome story of a Viking siege.

A wonderfully eccentric Victorian-era museum and library.

An impressive armored bronze effigy marks the tomb of one of the medieval era's greatest warriors.

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

The largest madrasa in Morocco once housed more than 900 students within its exquisite walls.

A Moroccan getaway in the mountain range that plays the Himalayas' stunt double.

In this desolate valley resides a gorgeous set of rocks sporting a technicolor design.

Tour the inside of a massive lava tube formed during a 1949 volcanic eruption.

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

12th-century holy complex shares land with a natural park full of heavenly waterfalls and raptors.