Thin strip of sky
A line of sky lies between the cliffs to the west of laolinhao and to the south of Chuanjia mountain. The two boulders face each other closely, forming a natural channel. The widest part of the trough is less than 2 meters, and its height is about 100 Zhang. Through it, a line looks at the sky. From top to bottom, a 99 step high and steep stone ladder is obliquely inserted into the deep valley of the old forest trench with a gradient of 70 ° from top to bottom, and the line of sight passes through the gap of tens of meters. Due to the gradual weakening of light intensity from top to bottom, the process of crossing a line of sky is from light to dark from top to bottom, and from bottom to top, it is from dark to bright, which is breathtaking.