Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

These fantastically named natural pools look like something out of a Scottish myth.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This sprawling Jewish cemetery is one of the largest in Europe.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

A towering monument to war, located on a beautifully peaceful hill.

Tiny memorials honor individual victims of the Holocaust.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

One of downtown Berlin's last reminders of its Communist past.

A unique Holocaust memorial tells the personal stories of the Jewish residents exiled from greater Berlin.

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

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

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

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

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

A fascinating insight into daily life in the Eastern Bloc.

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

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

Art and a pun, all in one.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.