Pronounced ‘hway’, this deeply evocative capital of the Nguyen emperors still resonates with the glories of imperial Vietnam, even though many of its finest buildings were destroyed during the American War.A major attraction is its vast, 19th-century citadel, surrounded by a moat and thick stone walls. It encompasses the Imperial City, with palaces and shrines; the Forbidden Purple City, once the emperor’s home; and a replica of the Royal Theater. The city was also the battleground for the Battle of Hu?, which was one of the longest and bloodiest battles of the Vietnam War.