Block Mounting
This popular product is simple yet effective - and has been around since at least 1974 as my parents still have them up on the wall. They have certainly stood the test of time better than the soft-focus monstrosities of the '80s!
Your photograph is given extra depth and dimension when mounted and sealed on an mdf board. You have a choice of black, white and plain mdf for the edges, or the image can be "wrapped" around the block.