China 🇨🇳

The "Heavenly Mirror" glass observation deck in Yangxin District of Huangshi City, Hubei Province in central China, was awarded by the Guinness Book of Records for its largest glass observation deck.  

The "Heavenly Mirror" was built of 500 tons of steel and 1,500 square meters of glass. The largest single piece of glass is 18 square meters. People can walk on glass with an area of 700 square meters.