Hanoi, March 18 -- Rivers and canals that once served the Nguyen Dynasty's imperial court have now been transformed into unique experiential spaces at the heart of Hue, a heritage city that is popular among domestic and foreign visitors. Within the urban structure of the Hue Imperial Citadel lies a network of canals -locally known as "man-made rivers" - that encircle and run through the inner city. The most significant are the Dong Ba and Ngu Ha waterways, artificial canals once used to transport food and goods into the imperial capital. Ngu Ha connects with the citadel's defensive water system, passing landmarks such as Tinh Tam Lake and Tang Thu Pavilion, while the Dong Ba River - also called the Ta Ho Thanh moat - runs along the easter...