Dubuque - the Key City. Located in northeastern Iowa and just over the bridge from Wisconsin. You can gamble at the Dubuque Greyhound Park and Casino or the Diamond Jo. You can visit the many Mississippi critters at the National Mississippi River Museum and Aquarium as well as learn some history about the mighty river. To get a good look at the river try Eagle Point Park. The Grand Harbor Resort located not far from the aquarium has a 25,000 sq. foot indoor waterpark. In the winter you can visit Sundown Mountain for a day of skiing.