Sunge Mani Stone Castle, or Songge Mani-Sutra City is a massive complex built out of Tibetan mani stone tablets located in the Zachukha Grasslands. The rectangular castle is facing south, measuring 73 metres long and 47 metres wide. The height of the outer wall is about 9 metres, and the highest point of the castle is 15 metres. It is built in the structure of a mandala, without any supporting frames and construction adhesives. The outer walls are covered with rows of niches that look like countless “windows”. Most of the niches are filled with exquisitely carved stone statues and paintings of Buddhist deities. The interior is structured like a maze of corridors. A shrine dedicated to King Gesar and his thirty generals is located at the centre of the castle.