Spaniard in US

My Spanish roommates from Spain came to visit for 2 weeks. I took them to Philadelphia, DC and New York. For those of you that don't know these cities let me sum them up. New York is an expensive place to be a tourist. DC is full of Segway (http://www.segwayguidedtours.com/) tourists - watch out. Philadelphia is fantastic and captivates Rocky-wannabes from all the over the world.