With a long history as one of vietnams most important cultural and religious centers hue is a popular stop for visitors to vietnam due to sights like the tombs of the nguyen emperors thien mu pagoda and the imperial citadel on this 4 hour city tour discover how the citadel is reminiscent of pre communist vietnam and is one reason why hue became a unesco world heritage site with a guide learn about hues turbulent history as you explore cultural attractions select a morning or afternoon