https://www.geocaching.com/geocache/GC34C4K_rio-daventuras-a-lagoa
GC34C4K Rio d'Aventuras - A Lagoa (Traditional Cache) in Aveiro, Portugal created by Valente Cruz &...
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...