Described by the listing agent as the "best penthouse in Chicago", this incredible rooftop mansion is truly unbelievable. Spanning a staggering 8,000 square feet (743sqm), the duplex dates back to 1927 and exudes historic charm.

Jameson Sotheby's International Realty further described the place as being "rich in scale, history and presentation" and we can't help but agree. The building was designed by New York architect Rosario Candela and Chicago firm McNally & Quinn, and the penthouse was built especially for the building's original owner.

Secret rooftop dwellings hiding in plain sight