Macabre astrological automaton clock dating to the late 1400s.

Each year, Germany's "City of Dragons" slays the world's largest walking robot.

A centuries-old copper mine that once provided two thirds of the world's copper supply.

The official meeting point for the oddly named governing assembly of ancient Sweden.

This mysterious runestone embedded in a church wall is linked to the medieval cult of Saint Erik.

Ancient burial grounds of the wealthy.

This chimerical bridge/tunnel appears to dead end right into the sea.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

It houses the remains of a 17th-century version of the Titanic.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

A quartet of rusting satellite goliaths are all that remain of a communication network that protected Britain from German and Russian air strikes.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

This ancient stone bridge dates back to the early Middle Ages.

The world's first military tank was designed in this English city amid the stalemate of WWI trench warfare.

One of three sites in England that house the National Collection of Arms and Armour.

This little-known hero has been protecting "The Fens" for close to 400 years, and now from its most powerful challenger yet: climate change.

A poignant memorial to the 106 coal miners killed in three major accidents in Derbyshire.

The house in the middle of the motorway.

The final resting place of hundreds of Polish airmen who died fighting the Nazis in Britain.

This memorial pays homage to the Royal Air Force squadron that breached two important dams during World War II.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

This lone tower casts an outstretched shadow over the site of a once-wealthy Knights Templar preceptory.