Iran’s climate is mostly arid or semiarid, subtropical along the Caspian coast Terrain: Rugged, mountainous rim; high, central basin with deserts, Mountains: Small, discontinuous plains along both coasts Lowest point: Caspian Sea – 28 m Highest point: Damavand (mountain top) 5,671 m Natural resources: Petroleum, natural gas, coal, chromium, copper, iron ore, lead, manganese, zinc, sulfur .