4. The Cliffside Frozen Peak Castle
Location does half the work on this one. Find a frozen peak, build right into the cliff, and let the mountain be your back wall. Snow bricks blend so well with the terrain that the castle looks like it grew there.
Use stairs and slabs to follow the shape of the rock, add a narrow bridge to the entrance, and don’t over-light it. A few lanterns go a long way when the rest is snow, stone, and sky.