The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

Berlin's old airport.

This historic stone bridge has an entire neighborhood clinging to its sides.

"The most colorful grottoes of the world.

This "floating railway" is one of the world's oldest monorail systems.

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

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

A sprawling Baroque park with 300-year-old hydro-pneumatic waterworks.

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

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

One of these two land speed record-breaking vehicles went so fast it shattered the sound barrier.

This star-shaped artillery fort protected the mouth of the Thames from the 16th century to the Second World War.

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

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

One English town's celebratory landmark spurred more trouble than anticipated.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

A whimsical cottage from the 1300s with a preserved Victorian-era post office inside.

These bleak 800-year-old ruins were once the royal residence of choice for hunting in Sherwood Forest.

The commemorative stone column conceals a secret laboratory.

In the ruins of Glastonbury Abbey lies the alleged resting place of the legendary king.

An architectural oddity hides in plain sight on this iconic London bridge.

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

The first archaeological site discovered by aerial photography.