Geocaching

If you want to try something new on vacation this summer, consider geocaching.  As described online, this sport requires a handheld GPS or a cell-phone app and a membership to geocaching.com (free for general use; premium membership, with custom searches and alerts, costs $10 for three months). A treasure hunt that's played globally, geocaching involves finding a "cache," usually a waterproof box, that another enthusiast has hidden. There are more than a million caches stashed all over the world, so the likelihood that you'll find one in your vacation location is rather high. Enter the coordinates to a local cache, lace on your hiking boots, and go on a treasure hunt. When you find it, take a prize from inside -- usually small trinkets like toys, buttons, or coins -- and leave something for the next geocacher to discover on their hunt.