Rummaging around in the undergrowth of neighbourhood parks is one of my favourite hobbies. Occasionally it leads to suspicious looks, but it is perfectly innocent; I am searching for geocaches.
A geocache is a small container that people hide for others to find using a GPS device. The most common caches are made from film canisters, eclipse containers or plastic lunch boxes but they can be any size as long as they can contain a log book for visitors to sign. They are usually camouflaged in some way and are sometimes hidden in items designed to look like something else.