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.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

Hidden on the seventh floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

The palatial McDonald's that inspired Wesley Willis.

The first home and studio that belonged to the famous architect.

In 2004, a Dave Matthews Band tour bus dumped 800 pounds of waste off a bridge and onto an unsuspecting tour boat below.

The oldest house in Galena, Illinois, now is a reminder of when this city was the world's lead mining capital.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

It was originally part of a "terrible lizards" collection at the 1964 New York World’s Fair.

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

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

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

Illegal drag racing two stories beneath Chicago’s streets.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

These pretty kitties killed and ate as many as 135 railway workers.

Years of archaeology, just chillin' by the water cooler.

An enormous park-like oasis, full of famous Chicagoans’ graves.

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

Romance fans worldwide make the pilgrimage to this group of historic covered bridges in rural Iowa.