<P> Elevation extremes: lowest point: Caspian Sea − 28 metres (− 92 ft) highest point: Mount Damavand 5,610 metres (18,410 ft) </P> <P> Iran is currently engaged in international territorial disputes with several neighbouring countries . </P> <P> The country protests Afghanistan's limiting flow of dammed tributaries to the Helmand River in periods of drought . The lack of a maritime boundary in the Persian Gulf with Iraq also prompts jurisdictional disputes beyond the mouth of the Aravnd Rud . Iran and the United Arab Emirates have a territorial dispute over the Greater and Lesser Tunbs and Abu Musa islands, which are administered by Iran . Iran currently insists on dividing the Caspian Sea resources equally among the five littoral states, after the Russian - backed former soviet breakaway republics refused to respect the 50 - 50 agreements between Iran and the Soviet Union (despite their international obligation). Russia, Azerbaijan, Kazakhstan and Turkmenistan continue to claim territorial waters thus regarding the Caspian Sea as open international body of water, dismissing its geographically lake nature . </P> <Ul> <Li> Photo gallery </Li> <Li> <P> Southern Alborz range near Firouzkuh </P> </Li> <Li> <P> Maranjab dunes, Kavir desert, Kashan </P> </Li> <Li> <P> Aerial view of Mount Damavand, Mazandaran </P> </Li> <Li> <P> Badab - e Surt, Mazandaran </P> </Li> <Li> <P> Rain forest in Gilan </P> </Li> <Li> <P> Zayanderud and Khajoo Bridge over it in Isfahan </P> </Li> <Li> <P> Kabir Kuh ranges, part of Zagros Mountains in Ilam province </P> </Li> <Li> <P> Polond Desert, South Khorasan Province </P> </Li> </Ul>

Which of these regions shares its borders with china