Cirque de Mafate, Réunion

A vast volcanic amphitheatre with no roads, reachable only on foot or by helicopter, with small villages (îlets) and guesthouses (gîtes). Hike in for 2 or more days. The Cirques, Pitons and Remparts are a UNESCO site.

The view into Mafate from the Maïdo viewpoint at dawn is spectacular.