New Century Global Center (Chinese: 新世纪环球中心; pinyin: xīnshìjì huánqiú zhōngxīn) is a multipurpose building in the Tianfu New Area of Chengdu, China, and is the world's largest building in terms of floor area.
The 100-metre-tall (330 ft) structure is 500 by 400 metres (1,600 by 1,300 ft) in size with 1,700,000 square metres (18,000,000 sq ft) of floor space, making it the world's largest building measured by floor space. The Boeing Everett Factory in Everett, Washington, in the United States has the largest volume, while the Tesla Factory building in Fremont, California, has the largest footprint.
You can get there by subway 1st line and get off at the Jincheng Plaza Station.