Two Harbors - Lake County Historical Society Depot Museum

The original office and headquarters of Minnesota Mining and Manufacturing (3M) is now a museum featuring the history of 3M. The company got its start in 1902 and exhibits include Attorney John Dwan's recreated office; company photos, artifacts, and documents; and a "lab" area representing research and development, product diversification and growth.

Two Harbors Light Station was constructed in 1892. Displays explore the development of Agate Bay. Visitors can climb the stairs to the top of the lighthouse, explore the grounds which include the assistant lightkeeper's house, the control room of a recovered sunken ship, and a nautical museum.