Boating past the Ấm Islet some 20 minutes, we see Mặt Quỷ Islet or Monster Head Islet, which protrudes about 30-35 m from the waters of Bái Tử Long Bay.

Nature has carved the rock in the shape of a monster head, with a rough big nose standing out from a distorted face. From whatever angle, one still find it horrible.