The drone light show at April 2 Square was one of the most anticipated performances during the festival, an event organized to promote tourism in the central coastal town.
The swiftlet is a symbol of Nha Trang and Khanh Hoa Province, showing a desire to aim high.
The drones are programmed to coordinate and paint images with light.
An image of Mui Doi, the easternmost point on land in Vietnam which is in Khanh Hoa.
The drones were controlled by Corex. CEO Nguyen Minh Thang said that this was the biggest drone light show in Southeast Asia to date and it took over a month to prepare.
An observer used their smartphone to film Dien Khanh Citadel, a 230-year-old historic location in Khanh Hoa.
Tram Huong Tower, another popular travel destination in Khanh Hoa, was painted with light.
Each drone weighs 527 grams and has an RGB LED system. They can fly up to 250 meters and the maximum performance duration is 20 minutes.
