Cilaos is a town and commune on the French island of Réunion in the Indian Ocean. It is located centrally on the island, in a caldera of altitude 1,214 m. The caldera is also named for the community.
Wikipedia https://en.wikipedia.org/wiki/Cilaos
Official Website https://ville-cilaos.fr/
Coordinates -21°8'9.807" N 55°28'21.054" E