Find a local media and technology specialist to get your old-school camera film, printed photos, and/or VHS tapes of your wedding put into digital format. If you don't have the films, even printed pictures can be scanned and digitized. You could scan them yourself, but a professional will do it so much better. We recently did this with some old old family pictures and it was great!
If you want to go the extra mile, you can take the digitized photos and upload them to Shutterfly to make a picture book that will be printed and mailed to you.
Another idea is that 25 is the "silver" anniversary, so find a special piece of artwork or something in silver to mark the occasion.
Happy anniversary to you and your DH!