The only Bahá'í house of worship in North America and one of only a handful worldwide.

The Beaux-Arts aquarium boasts a vast collection of saltwater and freshwater fish on an island in the Detroit River.

More than 5,000 contemporary and "historic" mustards from around the world.

A bizarre house filled with an astounding array of collections.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

The palatial McDonald's that inspired Wesley Willis.

In one Chicago park, a trio of werewolves are waiting to devour their fallen brethren.

Landmark Chicago building narrowly avoided destruction.

Odd, decrepit fountain honors Chicago author who had mixed feelings about his hometown.

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

Huge abstract sculptures of the Puerto Rican Flag.

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

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.

Theater has had many different incarnations but has survived the ravages of time.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

Illegal drag racing two stories beneath Chicago’s streets.

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

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

To find the "unicorns of the deep" you've got to go downstairs.

Former bath house turns gastropub.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

The 30,000-volume library is one of the world's most impressive poetry collections.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.