A1 Hill
A1 Hill (Doi A1) is a preserved battlefield hill in central Dien Bien Phu City, Dien Bien Province, northwestern Vietnam. It was one of the strongest French fortified positions during the 1954 Battle of Dien Bien Phu and the site of intense fighting for 39 days. Today it is a national historic relic featuring preserved trenches, bunkers, a crater from an underground explosion, and a memorial, offering insight into the battle's military history.