“Hoi An on the central Vietnamese coast is a well-preserved example of an important Southeast Asian trading port f-rom the 15th-19th centuries”. (TripAdvisor)
 
There are 412 destinations in the world are listed to vote for this award. The award is based on the criteria including reputation, tourist attraction and high recognition of such places. 
 
And its ceremony was held in Singapore on June 18^th.
 
Hanoi is rated 4th on the list while HCM City, Hoi An and Halong rank 15th, 17th and 25th, respectively.