I took a lot of the inherited photos in the amazing frames and put them on a staircase wall. It was just standing there - a full two stories of blank space. Now we have the opportunity to look every time we go up or down the stairs.
There are a few things I would do differently. First, I would have painted the wall BEFORE putting all of them up. I would also like to get a better light fixture. All-in-all I am satisfied with the outcome.
If you don't want a lot of holes in the wall, you can install a rod and use ribbon to hang the the frames. You get the benefit of fewer holes and you can colour co-ordinate the ribbon to your decor. I did this in one home and just stapled the ribbon to the frames then slid them onto the rod. It worked really well and you can swap out the photos and/or frames whenever you want.