Then you add cards to the pile to raise its value. You begin by placing down three cards, one for each pile. If a caravan goes over 26, it is no longer valid and you can restart the pile. The goal is to bring the total value of each pile to between 21 and 26 using your deck of cards. Caravan is a two-player game in which both players have three piles of cards, also known as caravans.