You betcha! I've been geocaching since 2003 and though I don't have "the numbers" that others do, it's still a lot of fun. Early on my kids liked doing it which gave us something to do together. It gets you off the couch and out there. Some of my best experiences have been while exploring areas I didn't even know existed, right here in my own backyard! Woody (the previous poster) has been rather prolific here in St. Mary's County and I second what he says about checking out the Maryland Geocaching Society.
Nattie_Bo (a.k.a. "Shiraz-mataz" to my geo-buddies...)