Réunion: Six Attractions and Natural Wonders

A French island of volcanoes and vertical cliffs

Réunion, a French overseas department in the Indian Ocean east of Madagascar, packs an extraordinary amount of dramatic terrain into a relatively small island — one of the world's most active volcanoes, three enormous eroded cirques ringed by nearly vertical cliffs, and waterfalls dropping hundreds of metres through dense rainforest. As part of France, it uses the euro and follows French administrative systems, giving it a distinctly European infrastructure layered over an otherwise tropical, Indian Ocean Creole culture.

The six below run from the volcano in the southeast to the interior cirques and the capital. The dry, cooler season (roughly May to November) is generally the most comfortable for hiking.

1. Piton de la Fournaise

Piton de la Fournaise, one of the most active volcanoes on earth, has more than 150 recorded eruptions since the 17th century, the latest beginning in January 2026, and its lava flows draw crowds to official viewpoints when activity picks up. The road up crosses the Plaine des Sables, a barren volcanic desert, and between eruptions a hiking trail leads across the vast caldera floor to the summit crater itself.

2. The Cirque de Mafate

The Cirque de Mafate, one of three vast natural amphitheatres formed by the collapse of an ancient volcano, is so remote that it has no roads at all — its small villages, supplied by helicopter, are reached only on foot or by helicopter, and hiking across the cirque's ridges and valleys, staying in mountain gîtes along the way, is one of the island's classic multi-day treks.

3. The Cirque de Cilaos

Cilaos, reached by road via a famously twisting mountain route, is known for its natural thermal springs, a distinctive local wine industry grown on the cirque's slopes, and lentil farming in terraced fields — along with hiking routes leading up to Piton des Neiges, Réunion's highest peak and the highest point in the Indian Ocean.

4. Saint-Denis

Saint-Denis, Réunion's capital, blends 19th-century Creole wooden houses and colonial administrative buildings with the ordinary infrastructure of a French departmental capital — supermarkets, a university, and government offices alongside markets selling tropical produce and Indian Ocean Creole cuisine reflecting the island's mixed French, African, Indian, and Chinese heritage.

5. The Trou de Fer waterfall

The Trou de Fer ("Iron Hole"), one of the island's most spectacular sights, is a sheer, densely vegetated gorge up to 300 metres deep into which several waterfalls plunge in stages, among them a final drop of about 300 metres. It is so remote that it is best seen from a helicopter tour; there is no roadside viewpoint, and the canyon floor was first explored only in 1989.

6. The west-coast lagoon

Réunion's volcanic origins mean it has relatively little of the classic coral-lagoon coastline found on neighbouring Mauritius, but a stretch of sheltered reef along the west coast around Saint-Gilles and L'Hermitage gives calm, family-friendly swimming and snorkelling — since a run of shark attacks, swimming outside the lagoon and supervised areas has been banned — in contrast to the dramatic, cliff-bound scenery that dominates the rest of the island.

Réunion rewards at least a week: the volcano and interior cirques demand serious hiking days, while the west-coast lagoon offers an easier, beach-focused contrast to close out a trip.