From the record
“Round Island Passage Light is an automated, unmanned lighthouse located in the Round Island Channel in the Straits of Mackinac, Michigan.”
Wikipedia article Round Island Passage Light, CC BY-SA 4.0.
One of 22 National Register listings published here for Mackinac County · listed in 2013 · category: Structure · built in 1947.
Sources: the Wikipedia article · the National Register database, National Park Service





