Six geocaches have been hidden along the backcountry of San Diego’s East County as part of a new marketing program, initiated by ConVis Visitor Services, for Historic Highway 80. Geocaching is a real-world outdoor treasure hunting game where players try to locate hidden containers (called “geocaches”) using GPS-enabled devices, then share their experiences online. This fun, … [Read more...] about “80on80”: Geocaching on a Historic Highway