https://www.geocaching.com/geocache/GC2JR0Z_donaustadtsudoku?guid=ad95d09e-a107-4b18-b4d2-29e4737dc215
GC2JR0Z Donaustadtsudoku (Unknown Cache) in Wien, Austria created by tauchmaus23
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...
in wiencreated byunknowncacheaustria