This image shows a substantial procession of horse-drawn carriages (stopped for the photo) as they would proceed down Main Street in the village on Mackinac Island, Michigan. Carriages are necessary as motor vehicles are not permitted on the island.

The caption states:
MAIN STREET AND VILLAGE
Mackinac Island, Michigan
Colorful horse drawn carriages wait to take visitors to the many points of interest on Mackinac Island. In the background, impressive old Fort Mackinac stands majestically against the sky.

–This postcard is dated 1950.