It made me remember why I always say "Iowa is not flat." My 5 year old thought it was great! He appreciated the train track, steep, cool ride. Totally worth it.
And after being gone for years, it was the reminder I needed that Dubuque is a gorgeous old city. It has a history. The architecture is so rich. Take a 15 minute stroll on around Fenlon Street area and you will see Victorian, colonial, craftsman, American foursquare and ramblers . You rarely see that. ANYWHERE.