Réunion National Park

Start with the air. Up here it is cool and thin, and it carries the smell of wet fern, damp basalt, and something resinous from the trees. Clouds move fast across the ridges. One minute the valley below is bright green and sharp in the sun. The next minute it is gone, swallowed by white mist. The ground is black and crumbly in some places and soft with moss in others. You are standing on a volcano, and it is still growing.

Welcome to Réunion National Park. It was created in 2007, and it covers a large share of this island, roughly forty percent of its land. That is unusual. In most countries a national park is a protected corner of the map. Here the park is the high, wild heart of the island itself. The towns and sugar cane fields sit around the coast, and the park rises behind them like a great green fortress.

In 2010, UNESCO added this landscape to its World Heritage list under a long but precise name: the Pitons, Cirques and Remparts of Réunion Island. Those three French words describe everything you see. A piton is a peak. A cirque is a vast natural amphitheatre carved out of the mountains. A rempart is a rampart, a sheer wall of cliff. Peaks, bowls, and walls... once you know those three words, the whole island starts to make sense.

The island was built by two volcanoes. The older one is Piton des Neiges, the Snow Peak. It stands at about 3,070 metres, and it is the highest point in the entire Indian Ocean. It has been quiet for a very long time. Rain, landslides, and erosion have broken its flanks apart. That slow destruction carved the three great cirques that surround it — Cilaos, Salazie, and Mafate.

Here is the first surprise. Mafate has no roads at all. People live there, in small hamlets scattered across the slopes, but you can only reach them on foot or by helicopter. Supplies, mail, and building materials often arrive by air. Children walk mountain paths to school. For hikers, Mafate is one of the great walking destinations on the island. For the families who live there, it is simply home.

Who first lived in these hidden valleys? Much of the story begins with escaped slaves. During the colonial period, enslaved people fled the coastal plantations and climbed into the interior. The French called them maroons. The steep cliffs and dense forest gave them shelter. Many peaks and places here still carry names linked to maroon leaders. Locals say that the name Cilaos comes from a Malagasy phrase meaning a place you never leave, though scholars still debate it.

Now turn your attention to the other volcano. Piton de la Fournaise, the Peak of the Furnace, sits in the southeast of the island. It is one of the most active volcanoes on Earth. It erupts often, sometimes several times in a single year. Most eruptions stay inside a huge horseshoe-shaped caldera called the Enclos Fouqué. Lava flows run down toward the sea and add new land to the coast. So the island is still growing.

The road toward the volcano crosses the Plaine des Sables. It is a plain of rust-red and charcoal-grey ash, almost bare of plants. Many visitors say it looks like the surface of Mars. Then you reach the viewpoint at Pas de Bellecombe. From the rim, you look down into the caldera. On its floor sits a small, neat cone called Formica Leo, named after the ant lion, an insect that digs funnel-shaped pits in sand.

The second surprise is about life rather than rock. Réunion rose from the sea alone, far from any continent. Plants and animals that arrived here had to adapt in isolation. Many of them now exist nowhere else on Earth. Look for the tamarin des hauts, a tree with twisted branches and fine, pale leaves. Listen for birds. If you are very lucky, you may see the papangue, the Réunion harrier, a bird of prey circling over the forest.

Some of these species are fragile. One small bird, the Réunion cuckooshrike, survives only in a tiny area of forest, and conservation teams work hard to protect it. Invasive plants are another threat. Ginger, guava, and other introduced species can spread quickly and push out native forest. That is why the park asks visitors to stay on marked trails, to clean mud from their boots, and to leave plants exactly where they grow.

Water shapes this place as much as fire. Réunion receives enormous amounts of rain, especially on its eastern side. Waterfalls pour off the ramparts in long white threads. In the cirque of Salazie, one well-known fall is called the Voile de la Mariée, the Bride's Veil, because the water breaks into a fine spray as it falls. In the village of Hell-Bourg nearby, old Creole houses with painted wooden verandas sit among tropical gardens.

A practical word, because this park is serious terrain. The weather changes quickly. Clouds usually rise from the valleys by late morning, so the clearest views come early. Paths can be steep, rocky, and slippery after rain. Bring water, a warm layer, and good shoes, even on a sunny day. When the volcano is erupting, access to some areas is closed for safety, so check local information before you go.

Now take a breath, and look around you once more. Notice the colour of the rock under your feet. Notice how the light shifts on the cliffs as the clouds pass. Everything here is in motion — lava building new ground in the south, rain wearing old mountains down in the centre. As you walk on, listen for the wind in the ferns and the sound of distant water. The island is still making itself, quietly, all around you.