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

The "Prussian Versailles" that is as glorious today as when it was built.

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

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

There has been an astronomical clock on this spot since the 14th century.

When you're a great Russian Tsar, even your vomit gets a statue.

Brussels' favorite peeing boy has a sister.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Climb inside an iron crystal magnified 165 billion times its normal size.

This holy site either displays a centuries-old cross or a complete fake.

It is believed that the historic tower is sinking at a rate of an inch a year, though no one is completely sure why.

Five miles of underground river link lake to ocean.

A patch of Philippines forest devoted to saving the lives of an emotionally sensitive species of googly-eyed primates.

Hundreds of wooden coffins dangle from cliffs and caves in the Philippines.

An eatery in a shallow river where diners can enjoy their meal mere feet from the base of an artificial waterfall.

Bohol's mysterious brown hills.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

Two stunning 17th-century libraries and a cabinet of curiosities.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Tiny memorials honor individual victims of the Holocaust.

A monument to the man who almost killed Hitler.

Metro station with a claim to rock n' roll fame.

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