Geocaching: 21st-Century Treasure Hunting : NPR

The sport that took off in 2000, after the government lifted restrictions on access to satellite signals used by the U.S. military, now has millions of participants worldwide. One avid geocacher in Maine says he doesn't think he's obsessed, but says his wife might disagree.
The sport that took off in 2000, after the government lifted restrictions on access to satellite signals used by the U.S. military, now has millions of participants worldwide. One avid geocacher in Maine says he doesn't think he's obsessed, but says his wife might disagree.

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