Recently, young people often spread each other about a place with a charming scene called "Tinh Tinh Coc". However, for those who are knowledgeable in Ninh Binh history, the exact name of this place is Am Tien cave, also known as the Dragon Cave because when looking from afar, it has the same shape as the dragon's mouth. Am Tien cave is a monument located in the complex of Hoa Lu Monuments in Ninh Binh province, about 400 meters from Dong Cua Dinh Tien Hoang Temple in the direction of Trang An, and adjacent to the East of the ancient capital of Hoa Lu .