Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This museum celebrating the almighty dollar lets visitors literally stand in the shadow of a million bucks.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

The palatial McDonald's that inspired Wesley Willis.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Illegal drag racing two stories beneath Chicago’s streets.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

First a root beer ad, then a golf course clubhouse, and finally a massive teapot.

Memorials and tributes scattered across the university grounds remember a famous national tragedy of the Nixon era.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

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

Berlin's old airport.

A prime example of socialist modernist architecture, wrapped in a enormous fresco about the media.

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

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

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

Budapest's Communist-era statues, banished to the suburbs.