What you can do, however, is create a travel bug whose goal it is to visit National Parks. That's exactly what I did with my newly created National Parks Passport travel bug. It's goal is to collect passport cancellation stamps from all of the National Parks. I got the idea from a travel bug that my dad recently found. I thought it was a really cool idea, so I copied it. I plan to release the TB sometime in the next few weeks. I really think it will be neat to see this bug run around and collect passport cancellations, especially if the geocachers that find it take pictures of the stamps and/or the parks they visit with it.
As part of creating the travel bug, I really enjoyed using the macro lens on the camera to take close-up pictures of the cancellation stamp. I used it for both the travel bug and for the NPS Passport Cancellation Station waymark at Guilford Courthouse NMP.