Using photos as a facilitation technique through visual metaphor is something I do regularly. I have a pack of over 100 image that really are quite random. You can download them all here:
Be aware that this is a fairly big (>150MB) file.
Download them and then print out as normal 6″ x 4″ prints, or bigger, or for added durability you can find places that will print as laminated post cards.
Let me know how you get on, and drop me a line for tips on games and workshops using the photos.
All the images are free for you to use in accordance with my Creative Commons Share Alike Licence.
stampLondon by Matt Ballantine is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.