Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

This shop for all your super spy needs hides an educational secret.

A lush green oasis in the middle of Chicago.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A tiny waterway named after a ghost story.

This theatre was made famous after Lee Harvey Oswald was captured inside watching a film.

Decaying military base deactivated in the 70s is now visited by urban explorers and military enthusiasts.

Once in disrepair, this popular Texas stop along iconic Route 66 has been restored to its past glory.

Three hundred years of preserved Spanish colonial history in San Antonio.

The pit stop from "The Texas Chainsaw Massacre" now serves beef and pork barbecue, not people.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

A 90-year-old underground water reservoir offers a more industrial kind of tranquility.

The man who wasn't there.

The world's second-longest burning light bulb.

Of course the grave of JFK's assassin is surrounded by conspiracy theories.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

This landmark of the Chicago silent film industry may not be in the picture business anymore but it still stands proudly.

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

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

All of Chicago's wood-paved streets are long gone but two alleys remain.

This unique exhibit "Dialogue in the Dark" reverses roles as the visionless become guides and the sighted become ‘blind.’

The final resting place of the famed German pilot, the "Red Baron."