Blend in with its surroundings. Be properly labeled with cache name, contact information and log location. Have a letter inside explaining the nature of the contents. Be located in a spot that doesn’t ...

On a sunny afternoon at Seattle’s Carkeek Park, Dave Baumchen appears to have his mind set on getting to know each and every one of the gnarled, nearly 120-year-old fruit and nut trees at Piper’s ...

On a recent too-hot morning at Papago Park, I try my hand at a high-tech treasure hunt that’s become an international craze. It’s called geocaching, and it’s both tougher and more fun than I expected.