This is another trip best taken in the winter. Want to see some amazing ice caves? Get on Route 13 from Duluth and head to Apostle Islands National Lakeshore. The trip can take you between three and six days because it’s about 250 miles, including coming back. You can go hiking into out-of-this-world icicles. Nordic skiing is another thrilling option if you chose to go on this road trip. It’s long, the 107-kilometer Birkebeiner trail system.