Tsaparang was the capital of the ancient Guge kingdom in the Garuda Valley, through which the upper Sutlej River flows, in Ngari Prefecture (Western Tibet) near the border of Ladakh. Tsaparang is a huge fortress perched on a pyramid-shaped rock rising about 500 to 600 feet (152 to 183 m) at the end of a long narrow spur. It contains numerous tunnels and caves that have been carved out of the rock. At its base was a village where the common people lived.