Hoi An is Vietnam at its most enchanting — a living museum where 15th-century trading port architecture survives intact. By day, cycle past mustard-yellow facades and visit assembly halls built by Chinese merchants. By night, the Thu Bon River glows with floating lanterns as the old town turns pedestrian-only, revealing hidden cafés, bespoke tailors, and street food stalls serving cao lau noodles found nowhere else on earth.