Geocaching is an outdoor treasure-hunting game in which the participants use a Global Positioning System (GPS) receiver or other navigational techniques to hide and seek containers (called "geocaches" or "caches") anywhere in the world. A typical cache is a small waterproof container containing a logbook and "treasure," usually toys or trinkets of little value. Today, well over 480,000 geocaches are registered on various websites devoted to the sport. Geocaches are currently placed in over 100 countries around the world and on all seven continents, including Antarctica.[1]
A little more info.
For the traditional geocache, a geocacher will place a waterproof container, containing a log book (with pen or pencil) and trinkets or some sort of treasures, then note the cache's coordinates. These coordinates, along with other details of the location, are posted on a website. Other geocachers obtain the coordinates from the Internet and seek out the cache using their GPS handheld receivers. The finding geocachers record their exploits in the logbook and online. Geocachers are free to take objects from the cache in exchange for leaving something of similar or higher value, so there is treasure for the next person to find.
Microcache hidden and found beside the Roman Colosseum
Microcache hidden and found beside the Roman Colosseum
Typical cache treasures are not high in monetary value but may hold personal value to the finder. Aside from the logbook, common cache contents are unusual coins or currency, small toys, ornamental buttons, CDs, or books. Also common are objects that are moved from cache to cache, such as Travel Bugs or Geocoins, whose travels may be logged and followed online. Occasionally, higher value items are included in geocaches, normally reserved for the "first finder", or in locations which are harder to reach.
Geocaches can range in size from "microcaches," too small to hold anything more than a tiny paper log, to those placed in five-gallon buckets or even larger containers. [4]
If a geocache has been vandalized or stolen, it is said to have been "muggled" or "plundered." The former term plays off the fact that those not familiar with geocaching are called "geo-muggles" or just muggles, a term borrowed from the Harry Potter series of books.[5]
If a cacher discovers that a cache has been muggled, it can be logged as needing maintenance, which sends an e-mail to the cache owner so it can be repaired, replaced, or archived (deactivated).
Wiki
Here is a huge Geocaching website.
Geocaching.com
I haven't had a chance to do this yet. I'm looking forward to starting. I'll probably wait closure to summer. I figured some other people would be interested in this.