Although the cache is technically on public land, it's close to private property. The property owners are aware of the cache and have given their permission; they thought it was a sweet idea too.
If you should drop a travel bug in this cache, or pick one up, please, please, remember to go to the travel bug’s page and log it (so many TB’s seem to get lost because people forget to log them) http://www.geocaching.com/track/travelbug.aspx