The conference center in Pittsburgh was my destination for a rail conference in June.  I was there for several days but it was only on the last day that I managed to get some time to head up to the roof area of the center.  It had some interesting gardens with views across the roof structure and some art installations.  It also had a great view across the river.  The top wasn’t the only interesting spot.  There was a route under the center too which I found on my first day there when I was struggling with how to actually get into the place.  It was not very intuitive which, given the nature of the place, seems rather odd.  I saw a few people riding bikes through this lower level, but I never went down there.