https://www.geocaching.com/geocache/GC1V21Q_sudokaxing-na-serra-da-boa-viagem
GC1V21Q SudokaXing... Na serra da Boa Viagem (Unknown Cache) in Coimbra, Portugal created by Necas
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...
serra da boa viagem