Xah Lee, 2010-01-20
“The ruins of an ancient Chinese watchtower from the Han Dynasty (202 BC - 220 AD), located along what was the old line of rammed-earth fortifications in Dunhuang, Gansu province, China, that once stretched from the Hexi Corridor (in Gansu) to the Tarim Basin (in modern Xinjiang).” ❐ img src
Dunhuang has Singing sand. To hear it, see this video:
“Singing Sand Dunes” (National Geographic)