Réunion (French island, region and overseas department)

Geography and climate

Réunion's terrain is volcanic and highly dissected: deep cirques, high peaks and narrow coastal plains define its landscape. Climate varies from humid tropical on the windward coasts to drier conditions leeward, with substantial elevation-driven changes. Vegetation ranges from coastal scrub and cultivated terraces to cloud forest higher up, supporting many endemic species.

Volcanism and geology

The island formed above a mantle hotspot, a process comparable to the Hawaiian Islands. Two major volcanic structures dominate:

• Piton des Neiges — the island's highest point at about 3,070 m, an older shield volcano now considered extinct with deeply eroded calderas.
• Piton de la Fournaise — an active shield volcano rising to around 2,631 m on the eastern flank; it is among the most frequently erupting volcanoes on Earth and is closely monitored for public safety.

The contrast between an eroded, dormant summit and a persistently active vent shapes much of Réunion's scenery and hazards, producing lava flows, ash emissions and landslides in different eras.

History, administration and culture

First visited intermittently by seafarers and later settled under French rule, Réunion became an overseas department in the mid-20th century. It is administered as both a French region and department, with local councils and representation in the French Parliament. The population is culturally diverse: people of African, Malagasy, Indian, European and Chinese descent contribute to a Creole culture expressed in language, cuisine and religious practice. French is the official language; Réunion Creole is widely spoken.

Economy, environment and tourism

The economy mixes public-sector employment, agriculture (notably sugarcane), services and tourism. Réunion National Park, which protects a large portion of the interior and unique biodiversity, attracts hikers and nature enthusiasts. Visitors come for dramatic hikes into cirques, volcano viewing, waterfalls and cultural festivals. At the same time, development and invasive species present ongoing conservation challenges.

Notable facts and distinctions

1. As an overseas department, Réunion uses the euro and participates in French social systems and institutions (status: region and department).
2. The island's mix of extinct and active volcanoes makes it a natural laboratory for volcanic science and hazard management.
3. Its capital, Saint-Denis, is the administrative and cultural hub, while smaller towns and coastal villages reflect the island's varied heritage.

For maps, travel guidance and official information, consult local authorities and specialist sources: basic geographic and administrative data are widely available online and in travel references (island overview).