This image shows the small Lake Michigan island called Cana Island, located off the coast of Wisconsin. Most notable is the Cana Island Light at the tip of the island.
Color Photography by Hagedorn
The description states:
CANA ISLAND
Aerial view of the lighthouse near Bailey’s Harbor, Door County, Wisconsin.
–While it is not obvious here, the island has been connected to the mainland by a causeway, just visible at the leftmost point of the island.
This postcard likely dates from the 1950s.