Nanjing

A coaster from a rooftop below the Sun Yat-sen Mausoleum on Purple Mountain: through golden ginkgo woods, diving through the old city wall at the Zhonghua Gate, high over Xuanwu Lake, round the lantern-lit Confucius Temple and down to the Yangtze by the great river bridge.

• Series: Coasters
• Length: 1.6 km
• 20 marbles a race, about a minute; every race is free