Put it together
Okay, so you have a flower-picture and a picture of an old rusty door ?? Both boring, dull, nothing special. Correct. But did you ever thought to put them together ??Yes, to blend them ??? All you need is a layer capable software, Photoshop, The Gimp etc. can do such job easily. Just load both pictures and copy one of them into the other as extra layer. The top layered picture will cover the other picture 100% so you have to do something ! Install a mask to the toplayer and paint with black color some “holes” into it, let the bottom layer shine thru. Change the opacity, the transparency of the toplayer to your taste and you will see how it works…
BTW: Such is a wonderful present, if printed on Fine Art paper and framed professional !