Geocaching is an outdoor treasure hunting game, where participants use a GPS receiver (such as a smartphone) to hide and seek containers, generally known as "caches". I have been geocaching since March 2009.
The co-ordinates of the caches are listed on the Geocaching website at www.geocaching.com. There are now over two million caches hidden around the world, so there's probably one very close to where you are now.
