Son Doong, Cu Chi Tunnels, and Sung Sot Cave are unique Vietnam wonders of the nature. They are named in many articles of CNN (US). Besides, other artificial wonders like shelter in Sofitel Legend Metropole Hanoi are also mentioned.
Sung Sot Cave is one of the largest and most beautiful caves in Halong Bay. Located in Bo Hon Island, Sung Sot Cave is a place where many rocky islands concentrated having distinct and strange shapes, which cannot find in other ones.