There are many grottoes located here, such as the Surprise, Luồn, Virgin and Male grottoes. There is also a concentration of high mountains with vertical cliffs like citadel wall; mountains follow closely make a huge beautiful watercolour picture on the sea.

French call this island Les Surprises. There are various species of plants such as benjamin fig trees, cycads and orchids... and animals are monkeys, deer and chamois. Perhaps, Bồ Hòn Island famous for the grotto system hiding inside it. Each of them has their own marvellous beauty and is related to the moved legends.