This image is an aerial view of the city of Charlevoix, featuring the area around Round Lake and associated buildings.
The description states:
Airview showing Round Lake Harbor, with Lake Michigan in the distance. Belvedere Hotel and Resort in foreground on Lake Charlevoix.
–The body of water in the lower foreground is Lake Charlevoix, which is joined to the distant Lake Michigan by Round Lake. The building in the center left of the picture is the Belvedere Hotel, which was demolished in 1960.
This card clearly dates from the 1950 before the hotel was razed.