Puncak Jaya, Carstensz Pyramid 
Puncak Jaya, sometimes called Mount Carstensz or the Carstensz Pyramid, is the highest mountain on the island of New Guinea, on the Australia-New Guinea continent and in Oceania. It is the highest point between the Himalayas and the Andes and the highest island peak in the world. The peak is located in what is variously called the Sudirman Range or the Dugunduguoo, in the western central highlands of Papua, the Indonesian western half of the island, and is the highest peak in the country.
Elevation: 4,884 metres (16,024 ft)[1]
Location: Papua Province, Indonesia
Range: Sudirman Range
Prominence: 4,884 m (highest point on New Guinea) Ranked 9th
Coordinates: 4°5′S 137°11′ECoordinates: 4°5′S 137°11′E
First ascent: 1962 by Heinrich Harrer and 3 others
Easiest route: rock/snow/ice climb
History
Puncak Jaya was originally called 'Carstensz Pyramid', after Dutch explorer Jan Carstensz who first sighted the glaciers on the peak of the mountain on a rare clear day in 1623 (Carstensz was ridiculed in Europe when he said he had seen snow near the equator). This name is still used among mountaineers. Although the snowfield of Puncak Jaya was reached as early as 1909 by a Dutch explorer, Hendrik A. Lorentz, the peak was not climbed until 1962, by an expedition led by the Austrian mountaineer Heinrich Harrer (of Seven Years in Tibet fame) with three friends — Temple, Kippax and Huizenga.
When Indonesia took control of the province in the 1960s, the peak was renamed 'Puntjak Soekarno' (Simplified Indonesian: Puncak Sukarno) or Sukarno Peak, after the first President of Indonesia, later this was changed to Puncak Jaya. Puncak means peak or mountain and Jaya means 'victory', 'victorious' or 'glorious').
Glaciers
While Puncak Jaya’s peak is free of ice, there are several glaciers on its slopes, including the Carstensz Glacier, the Meren Glacier (gone by 2000), and the Northwall Firn. 
Being equatorial, there is little variation in the mean temperature during the year (around 0.5°C) and the glaciers fluctuate on a seasonal basis only slightly. However, analysis of the extent of these rare equatorial glaciers from historical records show significant retreat since the 1850s, indicating a regional warming of around 0.6° C per century between 1850 and 1972.
The glacier on Puncak Trikora in the Pegunungan Maoke disappeared completely some time between 1939 and 1962[3]. Since the 1970s, evidence from satellite imagery indicates the Puncak Jaya glaciers have been retreating rapidly. The Meren Glacier melted away sometime between 1994 and 2000.
The Climbing
The Puncak Jaya area in mid 2005, with the Grasberg (Freeport) copper mine pit in the foreground and remnants of the glaciers behind. The summit is at the far end of the central rib.
Puncak Jaya is one of the more demanding of the two principal Seven Summits peak-bagging lists. It is held to have the highest technical rating, though not the greatest physical demands of that list's ascents. The standard route is up the north face and along the summit ridge, which is all hard rock surface. Despite the large mine, the area is highly inaccessible to hikers and the general public, requiring a 100-km hike from the nearest town with an airport, Timika, to the base camp, which usually takes about four or five days each way.
Source : Wikipedia