Royals, rebels, and artists have all conversed at this grand 19th-century Viennese coffee house.

This spooky statue sits outside a famous Prague theater.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

The bones of the Biblical Magi traveled to Constantinople and Milan before landing in their current home inside an elaborate golden reliquary in the Cologne Cathedral.

An abandoned swimming pool decays on the outskirts of Berlin.

One of the largest numismatic collections in Europe fell victim to a huge theft.

This spectrum of a star was observed by one of the world's most accurate spectrographs. 

A haunting contrast of trains that both saved and took the lives of Jewish children in Nazi Germany.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

Retirement home for giant obsolete machines.

Berlin's oldest surviving academic architecture hosted decades of animal dissections.

This public park collects signposts and other memorabilia related to local history, Polish-German relations and human progress

Where three rails and three centuries of transportation meet.

The only subway station in the city that still makes use of gap fillers.

A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Rummage through this sunken ship, but leave your scuba gear at home.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

There must be a pun in this haystack somewhere...

An artist's cute bronze subway sculptures belie his violent artistic past.

A bit of retro transportation flair preserved in the world's largest department store.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.