Largest cities
Port Moresby 514,000 pop.
Highest mountains
Mount Wilhelm 4,509 m (14,793 ft)
Mount Giluwe 4,367 m (14,327 ft)
Longest rivers
Sepik 1,126 km (700 mi) total, including a small section in Indonesia
Fly 1,050 km (652 mi), in the central part marks the border with Indonesia for a while
Largest lakes
Lake Murray 647 kmē (250 sq mi), in the rainy season its surface area can increase to over 3,000 kmē
Largest islands
New Guinea 785,753 kmē (303,381 sq mi) total, 372,500 kmē (143,823 sq mi) in Papua New Guinea
New Britain 35,145 kmē (13,570 sq mi)
Bougainville 9,318 kmē (3,598 sq mi)
New Ireland 7,404 kmē (2,859 sq mi)
Manus 1,940 kmē (749 sq mi)
Fergusson 1,437 kmē (555 sq mi)
New Hanover 1,186 kmē (458 sq mi)
Normanby 1,040 kmē (402 sq mi)