| Name | Depth (m) | Length (m) | Geology | Remarks |
|---|
| Marble Mountains | | | karst | Cave complex; Da Nang Province |
| Lang Trang | | |
| Phong Nha Cave | Unknown | {{Convert|7729|m|ft|abbr=on|sortable=on}} | karst | UNESCO World Heritage site; Quang Binh province |
| Tam Cốc-Bích Động | Unknown | {{Convert|125|m|ft|abbr=on|sortable=on}} | karst | Complex of three caves; Ninh Binh province |
| Thiên Đường Cave | Unknown | {{Convert|31|m|ft|abbr=on|sortable=on}} | karst | Quảng Binh province |
| Sơn Đoòng cave | {{Convert|150|m|ft|abbr=on|sortable=on}} | {{Convert|9000|m|ft|abbr=on|sortable=on}} | karst | Reputed to be the largest in the world; Quảng Bình Province |