Fireworks set off, today. "From the outside, the castles give off a cavern vibe—the dribbles look a lot like stalagmites. But once inside, visitors are treated to a winter wonderland of light. Much like the glacial cave tours people travel miles to experience in Iceland. "Tickets are available for the castles in Midway, Utah; Lincoln, New Hampshire; Stillwater, Minnesota; Wisconsin Dells, Wisconsin; & Edmonton, Alberta.