The fossilized remains of ancient California redwoods.

A ship that lived many lives under many names is now known merely as the "Ghost Ship."

These four islands right offshore have waterfalls, colorful lights, fancy buildings, and a secret purpose.

A famous big wave from Japan serves as a tribute to the victims of the disastrous Elbe flood.

This Dresden church was purposely rebuilt Protestant after being demolished in World War II.

Cold war icon and onetime "hole" in the iron curtain.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Berlin's beloved bear is immortalized at the Museum für Naturkunde.

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

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

An abandoned NSA listening post on Berlin's "Devil's Mountain."

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

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

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

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.

This strangely dressed taxidermy creature has a heartbreaking story.

A wonderfully eccentric Victorian-era museum and library.

A granite plane marks the site where a French aviator completed the first airplane flight across the English channel.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

One of the oldest seagoing boats in the world can be found at the Dover Museum.

A porcelain company's former dumping ground, completely covered in pieces of collectible ceramics.