4. Emperor Qinshihuang's Mausoleum, Shaanxi province (陕西秦始皇陵, shǎn xī qín shǐ huáng líng)
With an area of 56 square kilometers, Emperor Qinshihuang's Mausoleum is the world's largest underground mausoleum (世界最大地下陵墓, shì jiè zuì dà dì xià líng mù).
This mausoleum of the first emperor of Qin Dynasty (221-206 BC) is located at the northern foot of Lishan Mountain, 35 kilometers northeast of Xi'an, capital of Northwest China's Shaanxi province.
An army of more than 7,000 life-sized terracotta warriors and horses (兵马俑, bīng mǎ yǒng) was discovered at the site of the tomb in 1974. In 1987, it's inscribed in the World Heritage List of UNESCO.
