Torres del Paine National Park

Listen first to the wind. It comes off the ice to the west, across open grassland, and it does not stop for long. It pushes against your jacket and flattens the yellow grass. It ruffles the surface of the lakes into small grey waves. Then, for a moment, it drops away. The air goes quiet, and you can hear water running somewhere below you. Ahead, pale towers of rock rise straight out of the land.

Welcome to Torres del Paine National Park, in the far south of Chile. This is Patagonia, the narrow tail of South America, close to where the continent breaks into islands and channels. You are in the province of Última Esperanza, a name that means Last Hope in Spanish. The name comes from early European sailors who searched these fjords for a passage through to the Pacific. It still feels right out here, at the edge of the map.

The park takes its name from the towers themselves. They are three tall spires of granite, standing close together like the fingers of a raised hand. The word Paine is often explained as a word from the Aónikenk, also called the Tehuelche, the Indigenous people who crossed these plains on foot for thousands of years. In this telling, Paine means blue. On a clear morning, when the rock and the lakes and the sky all take on cool shades, that explanation is easy to believe.

Here is the first thing many visitors miss. The towers and their neighbours are not old mountains worn down by time. In geological terms, they are young. Molten rock pushed up from deep underground and cooled slowly into granite beneath a cover of older, darker sedimentary layers. Over long ages, glaciers and weather stripped much of that cover away. What remained is the hard, pale core. You are looking at the inside of the earth, brought into the light.

Now look for the Cuernos, the Horns. These are the massive peaks in the centre of the range. Their lower parts are light granite. Their tops carry a dark band of the older rock that once covered everything. The line between the two is sharp, almost like a painted stripe. Once you see it, you understand the whole story of this landscape in one glance. Light stone below, dark stone above... and the ice that carved them both.

That ice is still here. To the west lies the Southern Patagonian Ice Field, one of the largest bodies of ice on Earth outside the polar regions. Several glaciers flow down from it. The most visited is Grey Glacier, which ends in a high wall of blue and white ice on Lago Grey. Pieces break off and float across the lake as icebergs. Their blue colour is deep and strange. It comes from ice so dense that it absorbs most colours of light except blue.

The lakes surprise people too. Lago Pehoé and its neighbours are not ordinary blue. They are a milky turquoise, sometimes almost green. The colour comes from what scientists call glacial flour. This is rock ground into extremely fine powder by moving ice. Meltwater carries it down into the lakes, where the tiny particles hang in the water and scatter sunlight. So the colour of the water is, quite literally, the mountains themselves, turned to dust.

This land is not empty. Watch the open slopes for guanacos, the wild cousins of the llama. They move in groups, with long necks and soft brown and white coats. A sharp, high call means one of them has seen danger. That danger is often the puma. The park has one of the better places in the world to see these big cats in the wild, though sightings are never guaranteed. Above, look for Andean condors riding the wind on huge, steady wings.

There are smaller lives as well. The lesser rhea, a large flightless bird, runs across the steppe with surprising speed. Foxes cross the trails at dusk. In late spring and summer, low shrubs carry bright flowers, and small red blooms appear among the grass. Notice how most plants here grow close to the ground. In a place with this much wind, staying low is how you survive. Even the trees often lean in one direction, shaped by years of the same strong gusts.

People have changed this place too. For much of the twentieth century, large parts of the area were used for sheep ranching. Chile created the national park in 1959, and later the land was recognised by UNESCO as a biosphere reserve. Some of the old ranching history still shows in fence lines and estancia buildings. An estancia is a large ranch. In recent decades, the grasslands have slowly recovered, and wildlife has returned to areas where sheep once grazed.

The park has also learned hard lessons. More than once, fires started by careless visitors have burned large areas of forest and scrub. The dry wind spreads flames quickly, and the native forests grow back very slowly. If you walk certain trails, you will pass grey, standing trunks with new green life at their feet. This is why rangers take rules about stoves, cigarettes and campfires so seriously. One small mistake here can mark the land for generations.

Most visitors come to walk. The most popular route is known as the W, named for the shape it traces on the map. It links the base of the towers, the valley beneath the Cuernos, and the edge of Grey Glacier. A longer route, called the O or the circuit, goes all the way around the range. Many people never walk these trails at all. They watch from viewpoints and lake shores, and that is a fine way to know this place too.

Wherever you are standing now, take a moment. Turn slowly in a full circle. Notice the colour of the water, the dark band on the high rock, the movement of the grass. Listen for the wind as it comes and goes. When you walk on, look back once more over your shoulder. The light in Patagonia changes fast, and the towers you leave behind will already look a little different from the ones you saw a minute ago.