Landing on one of the Railroad Tiles can trigger the "Bank Heist" minigame. During this minigame, you're presented with a collection vault doors; each one hides your opponent's treasure! Once you've found three treasures of a kind, you'll see how much money you've stolen! 🎩💸
 
Keep in mind that Dice Multipliers have an effect on the rewards you might get from a Heist.