Nanjing, strategically positioned between the Yangtze River and mountains, served as the capital for six dynasties including the Eastern Wu, Eastern Jin, and the Song, Qi, Liang, and Chen of the Southern Dynasties. The Ming Xiaoling Mausoleum, built for the Hongwu Emperor, features a "Spirit Way" lined with magnificent stone sculptures, representing the pinnacle of imperial tomb architecture. In 2013, the Ming Xiaoling Mausoleum was inscribed as part of the "Imperial Tombs of the Ming and Qing Dynasties" UNESCO World Heritage Site. The Sun Yat-sen Mausoleum honors the founding father of modern China. The Confucius Temple-Qinhuai River Scenic Area captures the poetic essence of old Nanjing, with lantern-lit boats gliding along the historic waterway. The Nanjing City Wall remains the longest and largest extant ancient city wall in the world.