Former hotel turned into haunted playground.

Tour the luxe "glass cage" that inspired and unnerved the architecture world upon its debut.

This historic Illinois "Muffler Man" has been converted from axe-touting lumberjack to rocket-wielding space ace.

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

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

This abandoned 19th century orphanage started as a boarding school for children of Civil War veterans.

A 30-foot man on a penny-farthing bicycle rides along the banks of the Mississippi.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

A little-known subterranean street runs under some of the best-known buildings in Chicago's River North.

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

What was once one of the country's largest confectionary plants is now an abandoned ruin, but is still pretty sweet.

Former meatpacking facility turned vertical farm and sustainable business complex.

The face of a woman pushes its way through the earth.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

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

The final resting place of the world's first nuclear reactor.

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

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

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

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

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

This folk art wall claims to be the world's one and only memorial to the bygone age of hippies.

The dream home of an iconoclastic renaissance man still stands as a monument to his domestically mundane vision.

One of the most powerful computers in the world can be visited by anyone who wants to experience more computing than they can handle.