This part of the site is not fully advanced yet. It seems clear that people are going to want to search for caches by State, and maybe by Country. Or even zip code. I do not have these facilities yet, and will need to study a fair bit more about Google Maps API. I hope that, in the short term, the smaller number of Creation Caches will make searching possible. Meanwhile, watch this space!
If anyone has expertise on working with Google Maps API issues with WordPress, please get in touch!