When the kids were little and GPS units were still a gee-whiz novelty, we went geocaching a few times. (That’s the hobby where people hide trinkets outdoors and post the coordinates online, then you try to find them, leaving a trinket or notebook comment of your own when you do.) It was fun - particularly hunting for one under three feet of snow in Joe English Reservation, even though we never did find it - yet the novelty quickly wore off.

Not for lots of people, though: The screen shot above shows the first four geocaches that come up at 03061 zip code (Nashua’s downtown) at geocaching.com. There are at least 5000 listed in New Hampshire, although I don’t know how many are still active.