For culture vultures, there is no shortage of temples, tombs, pagodas and crumbling palaces to admire and explore. The UNESCO World Heritage site of Huế is home to the Citadel, once the emperor's private residence, and the Forbidden Purple City, where he housed his many mistresses. When your feet are weary, grab some bún bò buế (beef noodle soup) and watch swan pedalos cruise the Perfume River as the sun sets.