Khe Sanh, Vietnam
Just east of the Lao border, was the site of a US base which fell under attack in early 1968. The attack of the NVA on Khe Sanh was a diversion for the 1968 Tet Offensive in the south. The old airfield of red dirt still remains.
Listen to the audio guide for Khe Sanh Combat Base Free on WIP — starts by itself when you arrive, even with the screen off