Overview Thien Cung Cave (Heavenly Palace),Thien Cung Grotto Thien Cung Grotto, also known as the “Heavenly Palace Grotto,” is located in the southwest of Halong Bay, on Dau Go Island, near Dau Go Cave, about 4 km south from the tourist port. It is one of the most beautiful caves in Quang Ninh province, covering … Continue reading Thien Cung Cave (Heavenly Palace)