Watch day turn to night as you descend into the dark recesses of Apostle Islands Mainland Sea Caves. Equipped with a reliable flashlight and a sense of adventure, there's no saying what you might discover down there.
Admission fees apply at this natural underground attraction, which you'll find in Bayfield. Have some spare time on your hands? There are loads of things to do around this area. Wolfsong Adventures in Mushing is another attraction that makes for an enjoyable stop.