It turns out its the evolution of a game thats been played for over 150 years, just morphed with technology from an old hiking activity that combined orienteering, art and puzzle solving. Years ago hikers would leave a postcard or letter on the trail in a makeshift "letterbox" for the next traveller to post for them.
The 21st century version of Letter-boxing uses GPS on your mobile to find waterproof boxes called Geocaches, a typical cache is a small container containing a logbook. The player enters the date they found it and signs it with their established code name. This is then logged on the Geocache website to assist future players.
|Geocache provides a map with clues|
|At some stage you need to look with you eyes|
|At last, we have found our first bounty|
|We sign the log book|