In winter, the Swiss Alps are covered with white snow. But when the snow stops, skiers from all over the world will flock to the crowd. Skiing in several different valleys is not far from these crowded tourist attractions. There is a mountain that stands up to the sky and ordinary people cannot climb up. There is no cable car, and there is only a huge castle on the top of the mountain. From the appearance, it is estimated that it is at least a few hundred years old. There are several helicopters in front of the fort, all parked on a wide apron. It seems that the people in the castle are taking these helicopters up and down the mountain.