1. Mines of Spain Recreation Area: This fantastic recreation area offers great views of the Mississippi River at the Julien Dubuque Monument . The nature center is informative but small. There is a trail of old buildings with a small chapel-like building on the side of a hill. Very charming and picturesque scenery and totally FREE! There is a brand new visitor’s center too! Fall/Winter EB Lyons Interpretive Center Hours: Oct 15- April 15 – Monday-Friday 9-4. While the actual park is open 4-10:30 year round. The EB Lyons Interpretive Center is located at 8991 Bellevue Heights Dubuque, IA 52003-9214
2. Crystal Lake Cave : is Iowa ‘s largest cave and offers inexpensive exploration.  Even in the dead of winter, which can be quite chilly in Iowa , the cave remains at 52 degrees. Inside the cave are passageways showing fantastic formations and even an underground lake. The formations, anthodite, are also called cave flowers. Times vary so check their website.http://www.crystallakecave.com/times.html . Prices for adults are $12, children 4-11 are $6, 4 and under are free, and seniors get 10% off.
3. Shot Tower: One of the last standing shot towers in the U.S. and it is on the registry of national historic places. It was used for lead for bullets in the military.  Today it has undergone renovations and is part of the riverfront and is one of the most recognized symbols of the city.  The tower was built in 1856 and stands 130 feet tall. The first seven stories of the tower of Galena Dolemite stone and the top three stories are built of soft red brick.
4. Mississippi Riverwalk: Opened in 2003, the Riverwalk provides excellent views of the Mississippi River , landmarks of the city such as the shot tower and the Dubuque Star Brewery. The Riverwalk is part of a 44 mile trail that connects Dubuque to the renowned Field of Dreams in Dyersville , Iowa .  Don’t forget to check out the Julien Dubuque Bridge which crosses the river and connects Dubuque , Iowa to East Dubuque , Illinois .
5. Dubuque River Rides: T ake a cruise up and down the Mississippi River on a modern style boat OR an authentic paddlewheel boat!  Choose from several different tours, varying in length and focus. From 1.5 hour sightseeing tours to 3 hour sunset tours, to fall foliage viewing cruises. Another bonus? Cheap fares include port fees and are dependent on length of your chosen cruise. Select your cruise from their website:http://www.dubuqueriverrides.com/rates.html