Geocaching is a treasure hunting game that exploits the use of a Global Positioning System (GPS) as well as other navigation tools to hide and seek things which geocachers call “caches”. It is an entertaining way to explore unknown places, usually a valid alternative to other more common free time activities, but its potentials can also be exploited to produce flexible, creative, innovative teaching/learning units and modules. Geocaching MoM is a project supplementary to the Erasmus+, KA2 - Cooperation for Innovation and the Exchange of Good Practices, Strategic Partnerships for Schools Only (CallQ2016).