Round Island Lighthouse

 

The Round Island Lighthouse sits just 0.40 miles south of the Round Island Passage Light, the 

From wikipedia:  The Round Island Light, also known as the "Old Round Island Point Lighthouse" is a lighthouse located on the west shore of Round Island in the shipping lanes of the Straits of Mackinac. It was deemed necessary because the island is a significant hazard to navigation in the straits, and was seen as an effective complement to the other lights in the area. Because of its color scheme and form — red stone base and wood tower — it has been likened to an old-fashioned schoolhouse.  Ferries regularly pass it on their way to (and from) Mackinac Island, and it is a recognizable icon of the upper Great Lakes.

Round Island Lighthouse was constructed in 1895. The beacon was automated in 1924 and became the responsibility of the United States Coast Guard in 1939, when the Coast Guard took over all of the nation's lighthouses. To support World War II efforts, most of the original machinery on the first floor was removed for scrap.  The lighthouse was decommissioned in 1947, when the Round Island Passage Light was automated, and was transferred to Hiawatha National Forest in 1958.  

I thought it was really interesting that this lighthouse sits on a tiny island, about 500' from land.  But subsequent research reveals that the "island" effect id due to high water in the lakes.  It's even a high water emergency.

Here's a snip from Google Earth, showing where the lighthouse and the passage light are  (not my photo!):