As the eighteenth largest country in the world has two main mountain chains of Zagrus and Alborz that Zagrus is the longest and greatest one.
In fact 1/2 of Iran is mountains. Iran Mountains are part of Alp and Himalaya Mountain chains.
Iran is a country with combination of different natural attractions. You can visit magnificent desert and at the same time enjoy beautiful forests, Mountains or lakes. Iran is as the countries that has one of the largest lakes of world.i.e.Urmia.
More than one-tenth of the country is forested. The most extensive growths are found on the mountain slopes rising from the Caspian Sea, with stands of oak, ash, elm, cypress, and other valuable trees. On the plateau proper, areas of scrub oak appear on the best-watered mountain slopes, and villagers cultivate orchards and grow the plane tree, poplar, willow, walnut, beech, maple, and mulberry.
Iran; the second largest country of Middle East, is the country of mountains and deserts. In fact two-thirds of this country is mountains and deserts.
Having two important mountain ranges of Alborz and Zagrus cause to be introduced as one of the world's most mountainous countries that attracts many tourists and mountain climbers every year.
Iran's land surface covers 165 million hectares, more than half of which is uncultivable. A total of 11.5 million hectares is under cultivation at any time, of which 3.5 million hectares were irrigated in 1987, and the rest watered by rain. Only 10 percent of the country receives adequate rainfall for agriculture; most of this area is in western Iran. The water shortage is intensified by seasonal rainfalls. The rainy season occurs between October and March, leaving the land parched for the remainder of the year. Immense seasonal variations in flow characterize Iran's rivers.
Iran consists of rugged, mountainous rims surrounding high interior basins. The main mountain chain is the Zagros Mountains, a series of parallel ridges interspersed with plains that bisect the country from northwest to southeast. Many peaks in the Zagros exceed 3,000 meters above sea level, and in the south-central region of the country there are at least five peaks that are over 4,000 meters. As the Zagros continue into southeastern Iran, the average elevation of the peaks declines dramatically to under 1,500 meters.
Most of Iran is considered as the center of origin of many genetic resources of the world, including many of the original strains of commercially valuable plant species such as wheat, or medicinal and aromatic species. The southwest has some Afro-tropical features, while the southeast has some species from the Indo-Malayan sub-tropical realm.
The wetlands of Iran are globally significant. Large populations of migratory birds winter at these wetlands or use them on their way to and from wintering areas in Africa or the Indian Sub-continent. The marshes of the south Caspian lowlands in Iran's northwest are particularly important for over 20 species of ducks and geese while the mud flats of the Persian Gulf coast are of critical importance for shore birds, gulls and terns. A variety of marine mammals is observed in the southern waters of Iran.
Iran has the population of about 70.5 people that is made up of numerous ethnic groups; in fact Iranians are of the people who are ethnically, religiously, and linguistically diverse. In the 7th century Persians migrated from central Asia to Iran. They are the largest ethnic group of Iran who constitute of 51 % of Iran's population and speak varied Armenian, Turkic languages and Indo-Iranian.
The word “cave” refers to a natural underground hollow or passage that is formed when water runs through an area with enough force to dissolve or wear away rock.
A cave is a large hole that may be underground, in the side of a hill or mountain, or under a cliff.
Isfahan 
Shiraz
