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How tf am I supposed to retrieve this?
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Geocaching is a worldwide scavenger hunt that uses a GPS or phone app with GPS. There are over 3 million active caches around the world. Some are as small as a dime, others are big enough to walk into, all of them provide a unique adventure. We invite you to share your stories, photos, and experiences!
As someone else said, there are some difficult ones that require climbing gear (which reminds me of playing various MMOs) - one in my town is about 15m up a large tree!