Geocaching is a modern form of treasure hunting. Using GPS data, participants search for small hiding places known as caches. A smartphone with an app or a GPS device is sufficient to access coordinates and use clues. Inside a cache are small trade items and a logbook to record the find.
The activity is suitable for different age groups and works alone or in a group. Many caches are located along short walking routes. Others cover longer distances or combine the search with a hike. In the Westphalian Seven, there are varied tours:
simple hiding places, tricky puzzle caches, multicaches, or caches that require special equipment.
Some caches provide background information about places, for example at the Museumshof in Rahden. At other locations, stories are the focus, such as in Hille. In Espelkamp and Lübbecke, geocaching creates a kind of urban rally.