For 10 points, name this island shared between Brunei, Malaysia, and Indonesia.
Cities on this island include Balikpapan and Banjarmasin, and this island home to the Muller Mountains is directly south of a group called the Spratley Islands. One part of this island is ruled by the Sultan Hassanal Bolkiah, and this island is home to Mt. Kinabalu. Two regions on this island are Sabah and Sarawak, and its largest portion is known as Kalimantan. Separated by the Makassar Strait from Sulawesi, it is located north of the Java Sea and follows New Guinea as the largest island in its archipelago. For 10 points, name this island shared between Brunei, Malaysia, and Indonesia.
Cities on this island include Balikpapan and Banjarmasin, and this island home to the Muller Mountains is directly south of a group called the Spratley Islands.
Borneo