While I was reading the July issue of Shape magazine, I ran across a little blip about geocaching (pg. 42), which is somewhat like an athletic treasure hunt. The article describes geacaching as follows:

“Participants use GPS devices and often traverse rocks, mountains, and creeks to locate caches–usually a stash of trinkets and clues to the next location–that have been hidden by other geocachers.”

Shape also directed me to geocaching.com which explains the sport in greater detail, and allows you to seach by zipcode for caches in your area.

Sounds like fun.