2. The Frostveil Ice Crystal Castle

What if a castle glowed from the inside? That’s the idea here. Build the main walls from snow bricks, then cut in tall windows of pale blue glass and packed ice. At night, sea lanterns behind the glass make the whole place shine.
Keep the towers tall and narrow, and top them with ice crystal spires. It feels less like a fortress and more like something you’d find at the end of a frozen quest, which is exactly why people save it.