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

A hidden "place of interment for gentlemen."

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

One of Australia's largest secondhand bookstores.

An ancient rock engraving shows Aboriginals used their advanced knowledge of the stars to hunt and gather.

The smallest country in Australia is a principled little thing with a friendly emperor.

A mysterious stele of unknown origin sits on the peak of this curious mountain.

World's first "penitentiary," meant to be humane, drove men insane.

A stealthy Apache hideaway that became the haunting site of a mass grave.

Two small chapels housed inside an ancient tree.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

Started as a kitchen garden, now the second largest botanical garden in the world.

The sun acts as a key that only fits this giant keyhole twice a year.

The abandoned remains of this Victorian brewery hide crumbling bowling alleys and rusting industrial gear.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

An old department store turned Nazi prison turned artist commune.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

A fascinating insight into daily life in the Eastern Bloc.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Old Danish castle immortalized in Shakespeare's Hamlet.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

A gas station and a state sign commemorating the most famous claims of extraterrestrial abduction.