The national historical site at the Huu Tiep Lake in Hanoi's Ba Dinh District is where a B52 plane was shot down on December 27, 1972.
The Ministry of Culture, Sports and Tourism had previously sent a document to the Hanoi People's Committee regarding the renovation project, which includes building new structures, preserving and displaying pieces of the plane and removing sludge from the lake, which has been nicknamed the "B52 lake".
Over 152 m of surrounding walls and 34.6 m of rocky embankments around the lake will be demolished and rebuilt.
Workers sift through scrap to find metal pieces that could belong to the downed plane. A lot of the pieces are rusted after spending 49 years underwater.