Introduction to the First Line of Sky: The narrowest point between the two gorges is only 12 meters, and there is a pool at the bottom of the valley. Looking up at the sky, you can see a thin line in the sky, hence the name.
Introduction to the First Line of Sky: The narrowest point between the two gorges is only 12 meters, and there is a pool at the bottom of the valley. Looking up at the sky, you can see a thin line in the sky, hence the name.