Chinese Architecture / The Forbidden City. Beijing, China. It was built between 1406 and 1420 during the Ming Dynasty. It had been the imperial home of 24 emperors of the Ming (1368-1644) and Qing (1644-1911) dynasties. From their throne in the Forbidden City, they governed the country by holding court sessions with their ministers, issuing imperial edicts and initiating military expeditions.
Son Doong cave in Vietnam. It's over 5.5 miles long and can house a 40-story building. Did I mention there's a forest in there?