I LOVE looking at Christmas photos. It's one of my favorite holiday traditions. Even today, looking through my mom's stack of holiday photos is one of the first things I do when we go home. When I was little, my mom would cover the entire front door with wrapping paper and stick on a ribbon to make it look like a giant present. Then we'd hang all of the holiday photos and cards on it as they came in the mail.
This is our first Christmas being married and really the first time we've sent out holiday cards, which meant we also received a bunch in return. I began hanging them on a piece of yarn with tiny clothes pins across our dining room windows.
It's super simple but a really fun way to display the photos.
Here are a few other examples I found around the web (All of the photos link back to the sources). I'm always up for some new ideas, so share 'em if you have 'em.