This deck of 48 Knowledge Cards invites you to determine a location on the basis of certain clues. For example, "You're looking at the longest, skinniest national monument in the United States, wondering if a person could walk its 840 miles""€"appears on one side of the card. The opposite side answers the question and furnishes notes and observations on such topics as the location's geological formation, ecology, and features. The cards' content is as diverse as their subjects, but all yield solid information and inspiration for you to hit the road, the trail, the air, the water"€"or your favorite armchair.