Postcard from Zeist
The caption is Zeist, Vijver bij 't Groen Bergje - Zeist, pond near 't Groene Bergje. I don't know what 't Groene Bergje is; literally it means the little green mountain, so possibly it was a small hill near Zeist.
The card shows the pond (but no hill). On the background we see a shepherd with a few sheep and a dog, and a man who is sitting down at the pond and probably reading a book.