YOUR TICKET TO HISTORY 3 Lakecountyhistoricalsociety.org CAL 520 South Ave, Two Harbors 888-832-5606 TWO HARBORS SM Climb the tower of Two Harbors historic lighthouse, visit the birthplace of 3M, and explore exhibits at the Depot Museum. 3M and Lighthouse open Mid may through Mid October, Depot Museum Open Saturdays 11AM -4PM Year Round