Van Trinh Cave is one of the biggest and most beautiful caves in Ninh Binh province (Photo:VNA)

Van Trinh Cave is one of the biggest and most beautiful caves in Ninh Binh province (Photo:VNA)

The 4,000 square metre cave is located in Van Trinh village, Thuong Hoa commune, Nho Quan district (Photo:VNA)

The 4,000 square metre cave is located in Van Trinh village, Thuong Hoa commune, Nho Quan district (Photo:VNA)

Van Trinh Cave is one of the biggest and most beautiful caves in Ninh Binh province (Photo:VNA)

Van Trinh Cave is one of the biggest and most beautiful caves in Ninh Binh province (Photo:VNA)

 
 (Photo:VNA)

(Photo:VNA)

 Van Trinh Cave is one of the biggest and most beautiful caves of Ninh Binh province (Photo:VNA)

Van Trinh Cave is one of the biggest and most beautiful caves of Ninh Binh province (Photo:VNA)