Despite having started caching in 2003 and being a premium member, I still consider myself a newbie. We used to do long hikes for a single cache. Now it's all puzzles, park and grab and a race for numbers. I see "lab caches" in my statistics (obviously a 0), but it isn't something you can search for with the filter. What are they and how do I find one?? I'd love to try some of these new new cache types.