This E-Book on the Nakanai Mountains of East New Britain is in four parts. The first section provides an overview of the karst and cave attributes which led to the listing of Nakanai on the Tentative World Heritage List in a Serial Site known as The Sublime Karsts of Papua New Guinea. The next section provides a brief history of the region involving European encounters. This is followed with a brief overview of the archaeology of East New Britain. The fourth section highlights some of the unique flora and fauna of the Nakanai. The final section includes the UNESCO Justification for Significance on the Tentative World Heritage List