The Huangshan mountain range has many peaks, some more than 1,000 meters (3,250 feet) high. The three tallest and best-known peaks are Lotus Peak (Lianhua Feng, 1,864 m), Bright Peak (Guangming Ding, 1,860 m) and Celestial Peak (Tiandu Feng, literally Capital of Heaven Peak, 1,829 m). The World Heritage Site covers a core area of 154 square kilometres and a buffer zone of 142 square kilometres. The mountains were formed in the Mesozoic, approximately 100 million years ago, when an ancient sea disappeared due to uplift. Later, in the Quaternary Period, the landscape was shaped by the influence of glaciers.