Lorentz National Park

Listen first. Somewhere in the canopy a bird calls once, then again, sharp and metallic. Water drips from leaves that never fully dry. The air is heavy and green and smells of wet earth and rotting wood. If you are in the high country instead, the air is thin and cold, and the wind carries the smell of stone. Both of these places belong to the same park. That is the first thing to understand about Lorentz. It is not one landscape. It is many, stacked on top of each other.

Lorentz National Park lies in the Indonesian half of New Guinea, the second largest island on Earth. It covers roughly 2.35 million hectares. That makes it the largest protected area in Southeast Asia. Numbers that large are hard to picture. So try this instead. The park runs from a coastline of mangroves and tidal mud all the way up to permanent ice near the equator. You could walk, in theory, from salt water to snow without ever leaving protected land.

That unbroken line is the reason UNESCO listed Lorentz as a World Heritage Site in 1999. It is the only protected area in the world with a continuous, intact transect from snowcap to tropical sea. Along the way it passes through lowland swamps, rainforest, montane forest, alpine grassland and bare rock. Scientists value this because each band of altitude holds its own community of plants and animals. Here, all of those bands are still connected. Very few places on the planet keep that kind of continuity.

The mountains themselves exist because of a slow collision. The Australian plate is pushing north into the Pacific plate. Over millions of years, that pressure has lifted old seabed into the sky. Climbers on the high ridges sometimes find limestone, a rock that forms underwater. Think about that for a moment... the summits of New Guinea were once the floor of an ocean. The park also contains fossil sites that record the long story of life on this island.

At the top of all this stands Puncak Jaya, also known as the Carstensz Pyramid. It rises to about 4,884 metres. That makes it the highest mountain between the Himalaya and the Andes. It is also the highest island peak in the world. On a clear day, its dark limestone faces rise above the clouds. Clear days are not common here. Cloud often gathers by late morning and hides the summit for the rest of the day.

Here is a story most visitors have never heard. In 1623, a Dutch navigator named Jan Carstensz sailed along the south coast. He reported seeing snow on mountains near the equator. Back in Europe, people laughed at him. Snow in the tropics seemed absurd. He was right, of course. The peak now carries his name. Centuries later, in 1962, a team led by the Austrian climber Heinrich Harrer made the first ascent of the Carstensz Pyramid.

The park's own name comes from another Dutchman, the explorer Hendrikus Albertus Lorentz. He led expeditions into this region in the early twentieth century, around 1909 and 1910. His teams pushed inland from the southern coast through swamp and forest toward the snowline. The journeys were slow and difficult. Even today, most of this park has no roads at all. Travel happens by small aircraft, by boat along the rivers, or on foot.

Now the second surprise. The ice that Carstensz saw is disappearing. The glaciers near Puncak Jaya are among the very few left in the tropics. Scientists have watched them shrink quickly over recent decades. Many researchers expect them to vanish within the coming years. If you are standing in the highlands and see a white patch on the far ridges, look closely. You may be among the last generations to see ice on these mountains.

Life here changes with every few hundred metres of height. In the lowland forest, the southern cassowary moves quietly through the undergrowth. It is a large flightless bird with a bony crest on its head and a bright blue neck. Higher up live tree kangaroos, which climb rather than hop. The park is also home to long-beaked echidnas, egg-laying mammals with spiny coats. Birds of paradise display in the trees, and many species here live nowhere else on Earth.

This is not empty wilderness. People have lived in these valleys, forests and coastal plains for thousands of years. Several different indigenous communities call the area home. Among them are the Asmat on the southern coast, the Dani and the Amungme in the highlands, and the Nduga. Each group has its own language and customs. Their knowledge of plants, rivers and seasons is deep. Much of the park remains whole partly because these communities have lived with the land, not against it.

The Asmat are known around the world for their woodcarving. Their carvings often honour ancestors and are made from the wood of local trees. In the highlands, life follows a different rhythm. Gardens of sweet potato climb the valley slopes, and smoke rises from round houses with thatched roofs. If you meet local people on your journey, greet them with respect. Ask before you take photographs. You are a guest on land that has been home to someone for a very long time.

Visiting Lorentz is not a casual trip. Access is limited, weather changes fast, and the terrain is serious. Most travellers come with experienced local guides and an organised expedition. Permits are required, and security conditions in parts of Papua can change. Check current guidance carefully before you travel. Rain falls often, at almost any time of year. Bring layers, because a single journey can take you from sticky heat to freezing wind.

So take a moment, wherever you are standing. Look at the ground under your feet. It may be dark mud, wet moss, or pale broken stone. Look at the shape of the clouds over the ridges. Notice how quickly the light changes as they move. Everything around you is part of one long line, from sea to summit. As you walk on, listen again for that bird in the canopy... and remember how few places like this remain.