A number of forum members are cachers, and the TM makes a wonderful base camp for the activity. My wife and I have cached for a number of years, and have found caches in all 48 CONUS states. We enjoy it primarily because it prods us to go places we would never have visited otherwise. Parks, mountains, old mining camps, ghost towns - all lure us in with geocaches. Anybody been to Luckenbach, Texas? What a fun place. We know the song, but would never have visited without the caches.
Anyway, first thing to do is go to geocaching.com and become a member. Basic membership is free. After that, what can I tell you?
Bill