The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

Its eclectic exhibits range from the world’s first motorcycle to Luke Skywalker’s Land Speeder.

The first and only museum dedicated to stained glass and horology opened outside of Chicago in 2017.

No one knows how many bodies are in this vault in a Chicago public park.

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

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

Where Cusack's record store from the film "High Fidelity" was located.

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

Hot Doug's "Hot Dog" Stand.

Grand opera on a miniature scale.

The sign to a demolished amusement park now stands in front of a local library.

This elaborate Hindu temple is located in a Chicago suburb, but looks like it was transported directly from India.

An exhibit of items from the mental institution where Mary Todd Lincoln lived after her son conspired to have her committed.

The world's only museum devoted to the wonders of fluorescence.

Baltimore's classic clock tower was once topped by a rotating, 20-ton medicine bottle.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

A museum dedicated to exhibiting remarkable outsider art.

The trials and tribulations of marking Poe's grave.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

The evolution of recreational vehicles and motorhomes is on display in the “RV capital of the world."