Cirque de Mafate

Cirque de Mafate is the westernmost of Réunion's three great cirques, a steep-walled natural amphitheatre carved by millions of years of stream and river erosion from the island's central highlands, and it is among the most remote and dramatically scenic inhabited landscapes in the Indian Ocean, accessible only by the spectacular ridge-top trail network or by the helicopter that serves as the cirque's emergency and supply link to the outside world.

Unlike the agricultural Cirque de Salazie, which is threaded by a scenic road, Mafate has no through roads and no commercial development of any kind; its scattered villages — Îlet à Malheur, Marla, Roche Plate, Grand Place — cling to narrow ridges and tiny pockets of flat ground between the towering canyon walls, their Creole houses appearing suddenly out of the mountain mist as the trail crosses saddles between the peaks, each village a self-contained world in miniature.

The GR R1 trail that traces the cirques rim for several days is one of the great long-distance walks of the Southern Hemisphere, a continuous sequence of aerial panoramas across the enclosing ramparts, down into the canyon of the Rivière des Galets as it roars toward the coast, and across exposed high passes where the whole island suddenly opens up beneath you, the shimmering coastal plain of Saint-Denis visible to the north and the indigo mass of the active volcano to the east. At its highest point the trail crosses the Col du Taïbit at 2,047 metres where a small shelter provides emergency refuge and the view south encompasses the full southern wall of the caldera, an unbroken cliff face of more than a thousand metres.

The sense of enclosure inside the caldera is almost theatrical: from the floor of the cirque the sky is reduced to a vast oval of blue framed by the near-vertical walls of Gros Morne and Le Maïdo, and the effect is of standing at the bottom of a colossal stone bowl that channels clouds, sound and weather in ways that make sudden afternoon cloud bursts, dramatic sun shafts and double rainbows across the amphitheatre typical even in the dry season from May to October.

The geological walls of Mafate are composed of older basaltic flows that predate the island's current volcano and contain mineral suites and rock formations found nowhere else on Réunion, a geological archive of the island's volcanic origins that also explains the remarkable variety of microclimates and soil types that support the extraordinary biodiversity for which the island is renowned among botanists and naturalists worldwide.

It is one of the few roadless calderas in the world that remains permanently inhabited, offering a combination of geological drama and human scale that is almost impossible to find elsewhere.

The multi-day GR R1 rim trail provides some of the most sustained and varied mountain panoramas available in the Indian Ocean region.

The isolation of the caldera villages, reachable only by full-day hikes, preserves a traditional mountain lifestyle and vernacular architecture that has largely disappeared from the rest of the island.