https://www.geocaching.com/geocache/GC1THHE_castro-de-tintinolho-guarda
GC1THHE Castro de Tintinolho [Guarda] (Traditional Cache) in Guarda, Portugal created by pamfer
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...