If you have any interest in Geocaching then you mu...

If you have any interest in Geocaching then you must visit HQ while in Seattle. They are open limited hours and you should RSVP via their web site when you visit to ensure they will be free. There are a ton of memorable items from Geocaching history, a cool cache for you to log and a ton of trackables as well! Merchandise unique to HQ is available and they people working there are super nice and happy to help answer questions. There are also a ton of great caches in the area and they have a sheet listing all of them in the HQ tour!