Sand Castles does an incredible amount with how small it is! All you do to create a place, whatever you "castle" may be, draw cards, place them down and answer the questions. And the questions are as simple as "what's beautiful here?" but it goes so far. I love that places, like Kitchen, show up several times with different questions, or even more broad places + questions can be placed around multiple times. And you start to create a vague layout by placing cards down, it's not a perfect map but it's exactly what you need.
Really beautiful, and will definitely go back to it when I need to create a "building" with others. Take your map/city-making games (like Street Magic or Beak, Feather, and Bone) and zoom into one location with Sand Castles. Brilliant!