In biogeography, the Mediterranean Basin (also known as the Mediterranean region or sometimes Mediterranea) is the region of lands around the Mediterranean Sea that have a Mediterranean climate, with mild, rainy winters and hot, dry summers, which supports characteristic Mediterranean forests, woodlands, and scrub vegetation. As a rule of thumb, the Mediterranean Basin is the Old World region where olive trees grow. However olive trees grow in other corners of the world which have a Mediterranean climate, and there are many areas around the Mediterranean Sea which do not have Mediterranean climate and where olive trees cannot grow.