The world's longest man-made waterway — crossing five major river systems to connect north and south, continuously pumping southern grain and wealth into the empire's heart.

Grand Canal Beijing / Tianjin / Hebei / Shandong / Jiangsu / Zhejiang

A monumental multi-arch stone bridge spans the canal, a small grain barge passing cleanly beneath its main arch. Terraced rice fields, white-walled granaries, and a red-bannered courier station line the embanked banks in warm late-afternoon light