Now you don't!
Actually, the second picture is the original I captured of a farm road last fall. I created the "now you see them" picture with my Photoshop Elements 9 program, by cutting and pasting the barn, horse, and cows from other pictures I have taken, as shown below.
This is the cow standing behind the horse.
This was my first attempt to add things to a picture (you can click on the picture to get a closer look, if you'd like). I usually remove things, such as power lines, signs, or other distracting elements that take away from the subject. Although it is far from perfect, I had fun playing with it and that's what counts, isn't it!