TianYun Shan (天云山), well known as the Glass Plank Bridge, is a pathway through the mountains in PingGu District in Beijing, China.
This spot is less touristic than the Great Wall. I don’t know why but it feels good to be able to walk around and take nice pictures whithout too many people on the way. it makes it easier to enjoy the grasslands and the view too.
for more informations how to go there, check the link below.