Geocaching https://www.geocaching.com/account/signin?ReturnUrl=%2Faccount%2Fmessagecenter%3FrecipientId%3D7b1c1477-8bda-47a9-92c1-5592d17d6af7%26gcCode%3DGCAWZK7&recipientId=7b1c1477-8bda-47a9-92c1-5592d17d6af7&gcCode=GCAWZK7
game where you use a GPS to hide and seek containers with
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