Greece is a country in the Balkan Peninsula of southern European, and lies to the south of Albania, North Macedonia and Bulgaria, and west of Turkey. It has a long coastline with the Mediterranean Sea and the Aegean Sea, and includes the island of Crete and many smaller islands. Mainland Greece covers about 80% of the total territory and is largely mountainous. The largest mountain group is the Pindus Range which forms the spine of the Greek mainland, with the highest peak rising to above sea level. The country's tallest mountain, Mount Olympus is further east, and rises to above sea level. The large Peloponnese peninsula, in the south of the country, is separated from the rest of the Greek mainland by the Corinthian and Saronic Gulfs, but joined by the Isthmus of Corinth.