This early 20th-century postcard shows “Old Loosemore Point Rock” near Oak Beach, Michigan. The natural arch, now gone, was shaped by erosion. The sepia tone and clothing styles suggest it was taken between the 1900s and 1920s.
The rock formation in the photo does resemble Turnip Rock near Port Austin, Michigan. Both formations feature an undercut base due to wave erosion, creating a dramatic, top-heavy appearance. However, Old Loosemore Point Rock had a natural arch, whereas Turnip Rock does not. The location near Oak Beach also places it further south along the Lake Huron shoreline, separate from Turnip Rock.