Last year we started geo-caching as a family (or as our family calls it--treasure hunting!). The main idea of it is trying to find hidden containers, called geocaches, using smartphones or gps. They are hidden in public areas all over the country (and world I think). It can be challenging, but it's a lot of fun too! We hadn't done it in a while, and decided to go again a few weeks ago. We were able to find 4 "treasures" in one outing.
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