Penguin

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 by using GPS-units. The cache usually contains a piece of paper, a pencil and different small objects for trading. Like coins, stickers, keyrings or a TravelBug.

Read more on geocaching.com.