Located just 2 degrees south of the equator, this small PNG island contains rugged steamy jungles and central limestone hills which rise to about 700 meters above sea level. Los Negros Island just off Manus is volcanic and more fertile than Manus. Manus is one of the least visited of PNG's offshore islands and has the smallest population....around 33000 residents. The Manus Province is actually made up of over 200 small islands.