What is a peninsula?
They are also not required to be connected via an isthmus which, correctly defined, is a narrow strip of land. The Eyre, Yorke and Fleurieu Peninsulas in South Australia, for example, are broadest where they connect to the land and taper to a narrow point. Cape York Peninsula in north Queenland is a huge tract of land, initially broad and narrowing gradually to its tip.
A peninsula (from Latin “paene insula”, almost island) is a geographical formation consisting of an extension of land from a larger body, surrounded by water on three sides. A peninsula can also be a headland, cape, promontory, bill, point, or spit. You could get more information from the link below…