Glowing orb in Minsk houses 8,600,000 items.

A former ironworks that was the first UNESCO industrial site.

This former Nazi castle was built as a school to train what would have been the future of the Third Reich.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

A 90-acre park on former landfill that hosts an annual kite festival.

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Most-visited and most-photographed slot canyon in the American Southwest.

Ever wanted the laymen's version of your credit card fine print?

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Famously misunderstood wonder of the ancient world

Hear the quietest sound from across the dome.

The taxidermied remains of a once-great parrot.

An unusual round church in London with a Templar past.

Op-art architecture designed for happiness.

Baroque celebration of the end of the Great Plague of Vienna.

The beautiful baroque library of the Hapsburg empire.

Legends surround an ancient tree trunk riddled with nails for good luck.

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

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

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