Bramble Cay, also known as Maizab Kaur and Massaramcoer, is a small cay located at the northeastern edge of Australia and the Torres Strait Islands of Queensland and at the northern end of the Great Barrier Reef. Lying around 50 km north of Erub Island in the Gulf of Papua, it is the northernmost point of land of Australia and marks the end of the Greā¦Bramble Cay, also known as Maizab Kaur and Massaramcoer, is a small cay located at the northeastern edge of Australia and the Torres Strait Islands of Queensland and at the northern end of the Great Barrier Reef. Lying around 50 km north of Erub Island in the Gulf of Papua, it is the northernmost point of land of Australia and marks the end of the Great Barrier Reef.