This image shows a family group standing atop the point of rocks known as Cave Point, on the Wisconsin shore of Lake Michigan.

Curteich Color 3-D Natural Color Reproduction
The description on the card states simply:
JW.4–CAVE POINT
DOOR COUNTY, WISCONSIN
–This image and a few others that will follow are identical or similar to a folio of small cards posted earlier on this site, shown here.
This card likely dates from the 1950s.