Baltimore Inner Harbor Power Plant: Pratt Street - A popular hangout! Barnes & Noble is built around the smoke stacks of the old power plant and inside pictures and descriptions tell about the history of the building. You can view the old water tubes from the inside. The Hard Rock Cafe, Gold's Gym, ESPN Zone, Chipotle and Houlahan's are also housed at the old Power Plant. Enjoy the day outdoors. There is plenty of outdoor seating and space for people watching too.