Song Thu Bon River, Hanoi Opera House, Son Doong cave ... is the travel site of CNN selected as the most beautiful destination in Vietnam. Song Thu Bon Vietnam is one of the "photogenic" landscapes in Asia, according to CNN Travel. The most beautiful destination here is the Thu Bon river in central Vietnam. The river originates from Ngoc Linh (Kon Tum) and flows through Hoi An ancient town (Quang Nam) to Cua Dai beach. Image: Dael De La Rey. Hanoi Opera House Designed and built by France from 1901 to 1911, Hanoi Opera House is based on the Palais Garnier in Paris, the most prominent architectural work of the capital. This is the venue for major events, concerts, contemporary cultural performances ... by Vietnamese and foreign artists. This theater is also the largest in Vietnam with a capacity of 600 people. Image: Huong Chi. Architectural masterpiece ...