The television network will reportlive from inside one of the world's most beautiful caves in the centralprovince of Quang Binh. The exact location is being kept a secret untilfilming is finished.
About six million subscriberswill watch this programme, which is due to live air on May 13, from 6amAmerican time (6pm Vietnamese time).
Viewers in Vietnam can watch the programme later on website abc.go.com.
The American broadcaster last month signed an agreement with localauthorities to feature the Southeast Asian country's beauty spots in itshigh rating Good Morning America show.
To prepare for the programme, ABC sent a 12-person crew and more than a tonne of specialised equipment to Vietnam.
A 32-second trailer of the programme was screened online last week, drawing many viewers.
Maria Stefanopoulos, a production manager at ABC News, Good MorningAmerica, told Tuoi Tre reporters that after watching the trailer, manyviewers thought that the programme was featuring amazing landscapes fromHawaii, not Vietnam.
Meanwhile, Romeo Durscher, acrew member, who is also director of education at DJI, a well-knowndrone camera producer, said only two hours after the launch of thetrailer, he got many requests from travel magazines for stories andphotographs.
Durscher, who is in charge of thecrew's drone camera operation, said the programme would use a total ofseven modern flycams to take aerial shots.
In April, he and other ABC technicians inspected the cave and conducted trial camera work, which turned out well.
Alongside an American crew of 12, another 120 people have arrived at the cave to contribute to the show's production.
While some equipment has been transported to the venue by road, bulky goods have been flown in by helicopter.
Ginger Zee, the host of Good Morning America and ABC World News Tonight, will appear on the Vietnam show.
"It's a great honour for me to be selected as the host of ABC'sfirst-ever live programme shot from inside a grotto in Vietnam," Zeetold Tuoi Tre.
Its exact location is being kept a secret from the public until filming is completed.
Crew members have been asked not to upload any snapshots taken duringthe trip onto social networks or reveal the filming location.
The programme will also feature images of Vietnam, including HaLong Bay and the Son River which meanders in Quang Binh province.-VNA