What began with a single, 357-pound chunk of the Canyon Diablo meteorite grew to be an impressive collection. 

A haunting collection of the vanished and disappearing natural world.

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

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

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

The original Garfield station is the oldest station facility on the "L", with the station house dating from 1892.

This titanic Catholic church in Chicago is also a refuge of the fictional cult-favorite wizard detective Harry Dresden.

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

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

Rifle through images of skyscrapers, Worlds Fairs, and more in the largest public postcard repository in America.

This small, but long-running hobby club has built one of the largest model rail lines in the US.

A chance to follow in the footsteps of the word's most legendary animator.

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

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

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

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

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

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

A Bibliophile's Dream.

The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

Formerly Fire Station No. 27, the museum is a hidden gem in the heart of Hollywood.

A marine aquarium with an astounding variety of fish hides in the basement beneath the famous Palm House.

A commemorative plaque at the door pays tribute to an "American Patriot" known for his betrayal.