A must see attraction of Pittsburgh but be careful, because the employees that work there can be real nasty. All of the ones that I encountered are of senior citizen age, and herd you like cattle to get on this thing. The best part is their prehistoric method of collecting payment. They only take cash, AND you must have exact change to put in this drop box. Seriously? It really holds up the line.
Don't let their rude attitudes get to you, and you'll have a great time.