The Longmen Grottoes or Longmen Caves are located 12 km south of present day Luoyang in Henan province, China. The grottoes, which overwhelmingly depict Buddhist subjects, are densely dotted along the two mountains Xiangshan (to the east) and Longmenshan (to the west). The Yi River flows northward between them. For this reason, the area used to be called Yique (The Gate of the Yi River). From north to south, the distance covered by grottoes is about 1 km. Along with Mogao and Yungang, the Longmen Grottoes are one of the three most famous ancient sculptural sites in China. (from Wikipedia)