Atlanta, more or less. Says the back:

Dear Mother - second night here - cool and clear - no interest in using the motel’s swimming pool. All’s well - Love Oris.

The dutiful son sent it air mail.

Of all the image they could have used, why did they choose a bather smelling the palm of her hand? And did that sign ever fall and chop a car in half, as it seems to want to do?