The Secret Weapon Cellar (Hầm Vũ Khí Bí Mật) in Ho Chi Minh City is a hidden underground bunker located inside a modest townhouse at 287/70 Nguyễn Đình Chiểu, Ward 5, District 3.
Built by: Trần Văn Lai in 1966 and 1967.
Use: It stored nearly two to three tons of weapons, explosives (TNT/C4), AK-47s, grenades, and rocket launchers used by the Saigon Special Forces (Biệt Động Sài Gòn) during the 1968 Tet Offensive against the South Vietnamese and U.S. forces.
Designation: The site was recognized as a National Historical Monument in 1988.
Address: 287/70 Đường Nguyễn Đình Chiểu, Bàn Cờ, District 3, Ho Chi Minh City
Hours: Open daily from 7:30 AM – 11:30 AM and 1:00 PM – 5:00 PM (often closed for lunch between 11:00 AM and 2:00 PM)
Admission: Free (though small tips for the caretaker are appreciated).
Tip: Make sure to go to the authentic house on the right (the real museum with the weapons cellar). Next door is a separate cafe/exhibit featuring a vintage Citroën van, which is a separate stop.
