Geocaching is a high-tech treasure hunting game played throughout the world by adventure seekers equipped with GPS devices. The basic idea is to locate hidden containers, called geocaches, outdoors and then share your experiences online. Try Geocache online by putting in your postcode here to search for Geocaches near you.
The iPhone 3G, 3GS and 4G use a combination of GPS, Wi-Fi positioning and cell towers to determine your approximate location. Groundspeak’s iPhone Application then queries the Geocaching.com database in real-time and provides a list of geocaches near you.
iPhone App here
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