SEATTLE - Historical sightseeing may never be the same again. Now parents can tell their children to bring their smartphones with them for a nature walk, and national parks may want tourists to leave something behind.
Geocaching, a form of high-tech treasure hunting that utilizes clues from a GPS device, is being harnessed by tourist destinations as a new way to draw visitors and encourage them to explore.
Five locations from Washington, D.C., to Park County, Colo., recently launched tours created by Seattle-based company Groundspeak, which runs the Geocaching.com website.
The nearest geocaching tour is centered on Cache Creek, British Columbia; it weaves through the...