The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

A 12th-century fortress containing some of Berlin's oldest buildings.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

These lesser-known Maltese catacombs date back over 1,700 years.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

This subterranean necropolis holds three floors of antler-dug grave caves.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

Part museum, part piece of Arthurian-inspired history, this stately hall attracts King Arthur fans from miles away.

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

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

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

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

Perhaps the only prehistoric monument with its very own public bus stop.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

The remains of a small medieval chapel mark the legendary birthplace of the patron saint of Wales.

The castle still holds traces of the abandoned Roman fort it was built atop.

Recently restored menagerie of Victorian-era beasts.

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

The dance of this huge clock is a magnificent and eerie commentary on good and evil in the history of humankind.