Despite its small size, Israel is home to a variety of geographic features, from the Negev desert in the south to the inland fertile Jezreel Valley, mountain ranges of the Galilee, Carmel and toward the Golan in the north. The Israeli coastal plain on the shores of the Mediterranean is home to most of the nation's population. East of the central highlands lies the Jordan Rift Valley, which forms a small part of the Great Rift Valley. The Jordan River runs along the Jordan Rift Valley, from Mount Hermon through the Hulah Valley and the Sea of Galilee to the Dead Sea, the lowest point on the surface of the Earth. Further south is the Arabah, ending with the Gulf of Eilat, part of the Red Sea. Unique to Israel and the Sinai Peninsula are makhteshim, or erosion cirques. The largest makhtesh in the world is Ramon Crater in the Negev, which measures . A report on the environmental status of the Mediterranean Basin states that Israel has the largest number of plant species per square meter of all the countries in the basin.