Claim: Santorini is a peninsula.
Evidence: Santorini -LRB- Σαντορίνη , pronounced -LSB- sandoˈrini -RSB- -RRB- , classically Thera -LRB- English pronunciation -LSB- ˈθɪərə -RSB- -RRB- , and officially Thira -LRB- Greek : Θήρα -LSB- ˈθira -RSB- -RRB- , is an island in the southern Aegean Sea , about 200 km southeast of Greece 's mainland.