I recently did a photography journey through downtown and wandered into City Hall. I asked the guards if there was anything to see and they recommended the 27th floor observation deck. It is open to the public til 5 p.m. Wow, what a treat!! Amazing views of downtown are a photographer's dream and there were plenty to be had from up there. Besides the views, the 3rd floor also has great hallways to photograph and tapestries that line archways in the ceilings. It's definitely worthy of a stop while in downtown!