The Waterfront Line is a light rail line of the RTA Rapid Transit system in Cleveland, Ohio, running from Tower City Center downtown, then north and northeast to South Harbor station, adjacent to the Cleveland Municipal Parking Lot. The Waterfront Line is the newest rail line in Cleveland, having opened in 1996. The 2.2 mile line is unique in that it is an extension of the Blue and Green lines, but has its own naming designation. All RTA light rail lines use overhead lines and pantographs to draw power.

Tower City station, known alternatively as Tower City–Public Square and Tower City Center is a rapid transit station in Cleveland, Ohio, part of Tower City Center. It is the central station of the RTA Rapid Transit system, served by all lines: Blue, Green, Red and Waterfront. The station is located directly beneath Prospect Avenue in the middle of the Avenue shopping mall. The station is only accessible through the Tower City Center shopping complex, and, for this reason, the public concourse of the shopping mall is open at all times that the RTA Rapid Transit is in operation.