Lauren proposed to Alex among the rows of books on the floor with the windows overlooking the dinosaur bones! Great place to read and get your nerd on. The Museum of Natural History and the Museum of Art and Music Hall are also adjacent to this library.
One of several hotspots during the Homestead Lockout and Strike, the Bost Building was of extraordinary significance to America's labor history. Be sure to swing by the pumphouse near the Homestead Waterfront shopping center. You can't go inside it, but you can see the Carrie Blast Furnaces from there too! Side note for Nerdy Nerds: A really cool stone labyrinth commemorating the steel mills of Pittsburgh is not far from the pumphouse along the Greater Allegheny Passage bike trail.