Cao Bang Province:
Nguom Ngao Cave |
Pac Bo Cave
Ha Tay Province:
Dong Huong Tich
Ho Chi Minh City:
Củ Chi Tunnels
Kien Giang Province:
Mo So Cave
Lai Chau:
Pu Sam Cap Grottoes
Lang Son Province:
Chua Tien |
Nhi Thanh Cave |
Tham Thanh Cave
Quang Binh Province:
Phong Nha-Ke Bang National Park:
Phong Nha Cave |
Dong Tien Son
Quang Nam Province:
Bong Mieu Gold Mine
Quang Ninh Province:
Hospital Cave |
Dong Sung Sot
Thanh Hoa Province:
Con Moong Cave
