While it's called MANGOsteen, it has absolutely nothing to do with mango.
Mangosteen is a native plant to Sunda Islands and the Moluccas of Indonesia. Highly valued for its juicy, delicate texture and slightly sweet and sour flavor.
Due to restrictions on imports, mangosteen is not readily available in certain countries. Although available in Australia, for example, they are still rare in the produce sections of grocery stores in North America and Europe. Following export from its natural growing regions in Southeast Asia, the fresh fruit may be available seasonally in some local markets like those of China Towns.