Entries to the ancient town in Hoi An city in the central province of Quang Nam are free of charge on December 4 to mark 19 years since the area was recognised as a UNESCO world cultural heritage.
The normal fee to enter the quarters is 80,000 VND (3.44 USD) per Vietnamese and 120,000 VND (5.17 USD) per foreigner.
In 2017, the city welcomed over 3.2 million arrivals, more than half of them foreigners.
This year, it aims to serve 3.5 million tourists for a total revenue of more than 240 billion VND, and over 80 percent of the sum will be used to preserve the area.
For many, Hoi An is not just a collection of 16th century houses for which the former port city has been recognised by UNESCO as a world heritage site.
A cuisine native to the ancient city, influenced by many different cultures from Japan, China and Portugal, is a major part of its attraction too.
CNN recently listed Hoi An as one of the 16 best places in the world to relax in, while it was ranked second in a list of the safest and most exciting places for solo travellers by UK travel site Momondo.VNA