Images show massive grid-like and spiral patterns marked into the ground in the less than 100 miles from the headquarters of China's space programme in Jiuquan.
Some people believe the markings prove that China is planning an attack on the US and that one grid is similar to the layout of streets in the US capital.
The spiral pattern also appears to be peppered with military trucks and planes while another grid is 18 miles long and contains giant metallic-looking squares or holes.
