Occupying a large, bounded area on the north side of Perfume River; four citadels were comprised to create the Capital City: Hoang Thanh (Imperial City) for royal palaces and shrines, Tu Cam Thanh (Forbidden Purple City) for royal residences, Dai Noi (Inner city) and Tran Binh Dai, which exclusively ancient architecture. Tourists are expected to spend at least one day to visit the whole complex. They can also catch a taxi, hire a bicycle, rent a “xich lo”- Vietnamese cycle if do not feel like walking around the site.