https://www.geocaching.com/geocache/GC9NTPK_en2-032-geoart-vila-de-rei
GC9NTPK EN2 032 GeoArt - Vila de Rei (Unknown Cache) in Castelo Branco, Portugal created by Clavent
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...