GeoCaching is like the worlds greatest hide and seek. By hiding a container somewhere outdoors, often at some special location like a historic monument or scenic site, and then posting the coordinates on the Geocaching homepage others may find your cache.
The cache usually contains a peice of paper, a pencill and different small objects for trading. Like coins, stickers, keyrings or a TravelBug.
Read more on geocaching.com.
2 pages link to GeoCaching: