https://www.geocaching.com/geocache/GC16BTM_fisch-und-biber?guid=810bc7fc-c249-4059-a328-a51b0116c6e1
GC16BTM Fisch und Biber (Multi-cache) in Wien, Austria created by schluchtenhaxler & Tschuni...
Geocaching is a treasure hunting game where you use a GPS to hide and seek containers with other participants in the activity. Geocaching.com is the listing...