Visitors gather around the world's largest prayer wheel covered in gold foil in Sunan county, Zhangye city of Northwest China's Gansu province, on July 22, 2018. The wheel is 24.62 meters tall, with a diameter of 9 meters at the base.

built in 2009 with steel as its main structure and weighs more than 170 tons. There are patterns made of red copper on the wheel.

 A woman gets a close look at the world's largest prayer wheel covered in gold foil in Sunan county, Northwest China's Gansu province, on July 22, 2018. Inside the wheel, there are 880,000 clay sculptures and printed paper figures of Buddhas, along with 200,000 clay pagodas and printed paper pagodas.