A geological mystery on Camelback Mountain.

The palatial McDonald's that inspired Wesley Willis.

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

A tribute to one granddaughter's old apartment which now represents the whims of each visitor.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

A historic and oft-filmed prison stands in a Chicago suburb.

Illegal drag racing two stories beneath Chicago’s streets.

Cold War missile launch site which has been converted to a public park.

This botanical garden outside Chicago boasts an array of more than 300 varieties of lilacs.

A beloved Chicago music venue offering cold beer and lots of “Friendly."

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

The beloved home to all publications indie, erotic, and punky.

What may be America's largest classic video game arcade lurks inconspicuously in a Chicago suburb.

A hot dog stand where the heads are just as hot as the dogs.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A science teacher's dream.

A monument to the art of slicing people open.

This morbid, delightful curiosity shop offers everything from animal bones to human teeth.

World's second largest particle accelerator, where nature reveals its secrets.

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

This house renovated by Frank Lloyd Wright was the centerpiece of a lavish 20th-century estate.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

This cemetery is all that remains of a school for "wayward" girls.

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