Situated 22 kilometres to the north east of Mauritius, this island is an ecological treasure house. The number of endemic plants species living there, some of which no longer exist on the mainland, together with the presence of endemic reptiles make this island a unique place.
It is some 150 hectares in extent and rises like a cone out of the water to reach a maximum height of 300 metres. The geological basic composition is an agglomeration of tuff, volcanic ash, laid down in compact layers that look like rock.
source: MAURITIUS AND ITS ENVIRONMENT