Chicago’s City Hall boasts bigger secrets than what goes on inside. The building’s roof offers one of the most famous city rooftop gardens in the country, consisting of 20,000+ plants and 150+ species. Carefully selected for their ability to thrive in the Chicago elements, shrubs, vines, trees and more (many of which are native prairie plants) cover the majority of the rooftop.

According to Pursuitist, the rooftop garden helps to conserve energy, improve air quality, reflect heat and retain almost an inch of rainfall before producing runoff.

Can’t get enough of the latest and greatest Haute Real Estate and Design news? Like us on Facebook and follow us on Twitter! For haute pics of the most stunning listings and interiors, be sure to visit us on Instagram, too.

Photos courtesy of Pursuitist