Just eight kilometers south of the town of Zhangjiajie (China) in the northwest of Hunan province, within the Tianmen Mountain National Park There exists an abnormal object of all-natural origin - an enormous natural arch in the karst rocks of Tianmen Mountain or Tianmen Shan, known as the Heaven's Gate https://www.tourcounsel.com/2021/11/tianmen-mountain-cave-china.html