This book introduces the reader to the fast-growing outdoor sport of geocaching, which combines aspects of treasure hunting, high-tech navigation, and exploration.

New to this book:
--Updates to technology and use of social media.
--Full chapter on smartphone apps.
--Updates to photography—showing more technology and diversity of participants.
--Mention of National and State Parks, which are now promoting geocaching.
--Updates to swag, with official geocaching containers, special edition coins, and micro containers, etc.