River Point, previously known as 200 North Riverside Plaza, is a 52-story 730 ft. (213 m) tall skyscraper in Chicago, Illinois, located at 444 West Lake Street. The 52-story building has 1 million square feet (93,000 m2) of floor space. It sits on air rights above active railroad tracks and as well the subway portion of the CTA Blue Line, which affected the angle of some support columns, which in turn produced the parabolic arch in the base of the building.