The Guangzhou Tropic of Cancer Landmark Tower was completed on December 17, 1985, and opened on the summer solstice of 1986. It is the world's tallest landmark tower to stand on the Tropic of Cancer. The Guangzhou Municipal Government set up a stone to mark the boundary between the tropical zone and the northern temperate zone. Every year at 8:57 on June 21 (summer solstice), the sun will shine vertically along the Tropic of Cancer. At noon that day, the interesting phenomenon of no shadows being cast will appear from east to west Guangdong, through which the Tropic of Cancer passes.

Address: Sanjiazi slope, Yomapu Village, Taiping Town, Conghua District, Guangzhou (23°26’28”44 North Latitude, 113°28'56.16 East Longitude); 42 kilometers away from downtown Guangzhou.