1.On the Thu Bon River , 30 km south of Da Nang
----> "The ancient town of Hoi An lies on the Thu Bon River, 30 km south of Da Nang"
2.Hoi An is famous for its old temples, pagodas, small tile-roofed houses and narrow streets
----> "Hoi An is famous for its old temples, pagodas, small tile-roofed houses and narrow streets"
3.The house now looks almost exactly as it did in the early 19thcentury
----> "The house now looks almost exactly as it did in the early 19thcentury."
4.In 1999
----> "In1999, it was certified by UNESCO as a World Cultural Heritage Site"
5.Yes, it is
----> "In recent years, Hoi An has become a popular tourist destination in Vietnam"