The "Challenge" is to have 1,000 or something.
Obviously it has to be geocaching related, and you can't use "1,000 total finds" or "1,000 traditional caches," those would be too simple and the idea is to get creative.
I was going to list examples but I'd rather see what creative geocachers can come up with, if you have to copy someone before you that is fine, but it would be way more fun if you didn't.
Have fun!