Trump praised the beauty of Trang An and expressed his interest to visit the place.
The complex in the northern province of Ninh Binh has been recognised as a World Culture and Nature Heritage by UNESCO.
Located some 95 kilometres to the south of Hanoi, Trang An tourism complex covers 6,172 hectares and is nicknamed Ha Long Bay on land because of its system of big limestone mountains, caves and traces of an ancient sea believed to have existed some 200-250 million years ago.
As part of one of the three citadels of the Hoa Lu Imperial City during the Dinh Dynasty (968-980), it carries great historical value, not to mention its archeological importance as a site with traces of prehistoric man dating back to between 5,000-30,000 years.
However, the most famous attraction at Trang An is a network of 48 caves in the limestone mountains that are always submerged. Their total length is about 20 kilometres.
The place is home to 47 historical relics with numerous caves inside stunning limestone karst mountain ranges. It has also 31 lakes.
Suoi Tien Temple on Ngo Dong River
The film studio for Kong: Skull Island has been open to visitors since April 15, 2017