As part of the celebration of Sustainable Cleveland’s Cuyahoga50 at North Coast Harbor, Great Lakes Science Center will offer FREE general admission to all guests from noon to 5 p.m. on Sunday, June 23, courtesy of ArcelorMittal. The harbor will come to life as the areas around the Science Center and the Rock and Roll Hall of Fame are filled with activities, science shows, hands-on experiences and community partner booths.