Our plans Monday were to visit the art museum of Dubuque. We should have been wise to the fact that most museums are closed on Mondays! We quickly changed our plan and drove 3 miles south of town to Crystal Lake Cave. About a month ago we had seen Mammoth Cave and were not quite ready to see another cave, but as we discovered, this one is much different. In Mammoth Cave we climbed up and down many staircases and entered large cavernous rooms. In Crystal Lake we descended only once, and walked through narrow passageways. The latter cave is also a very wet cave with water dripping down on us, and muddy floors. Crystal Cave has many springs seeping into it, according to our guide. He can be seen below bending under a very large brown onyx-shaped bell.