I always do that as a passenger . I love those welcome sign boards when you enter a new city or state. I also take pictures if I see a beautiful natural view or some farm animals on a vast field. There is so much to capture when you are on the country side.
Never while I'm driving but when my husband and I are travelling the passenger may take photos from the car. WE usually stop if we see something of interest. We also have a dash board although they tend to record in batches and are sometimes unreliable.