Ha Long Bay is located in the northeastern part of Vietnam and constitutes part of the western bank of Bac Bo Gulf, including the sea area of Halong city and Cam Pha Town and part of Vân Don island district. It abuts Cat Ba Island in the southwest. Toward the west is the shore with a 120 km-long coastline. It is located within 106o58’-107o22’ east longitude and within 20o45’- 20o50’ north latitude. The site is 1553 sq. km with 1969 islands of various sizes, of which 989 have been named.
On the way to Ti Top Island, visitors see a stone rock resembling a thump jutting out of the sea.
Nature has put the Ngon Tay (Finger) Islet here as a reminder of many interesting extras in the discovery of Hạ Long.