<P> Mainland Greece forms the southernmost part of the Balkan peninsula with two additional smaller peninsulas projecting from it : the Chalcidice and the Peloponnese . The north of the country includes the regions of Macedonia and Thrace . To the south the mainland narrows and includes the regions of Epirus , Thessaly and Central Greece , where the region of Attica and the capital city Athens are located . Further south , the smaller peninsula of Peloponnese is separated from the rest of the Greek mainland by the Corinthian and Saronic Gulfs , but joined by the Isthmus of Corinth . </P>
mainland greece is a body of land with water on three sides called
peninsula