National Park Playing Cards
The standard deck includes all 63 national parks in the United States (some cards will have two parks that are close to each other or have some other obvious similarity)
Also available is the Pinochle deck, which contains 48 cards. It has two copies of 9, 10, J, Q, K, A. Each card has a different picture, so for example one Ace of Hearts is the Grand Canyon and the other Ace of Hearts is Zion.