Caspian Sea
The Caspian Sea, like the Black Sea, Namak Lake, and Lake Urmia, is a remnant of the ancient Paratethys Sea. It became landlocked about 5.5 million years ago due to tectonic uplift and a fall in sea level. During warm and dry climatic periods, the landlocked sea almost dried up, depositing evaporitic sediments like halite that were covered by wind-blown deposits and were sealed off as an evaporite sink when cool, wet climates refilled the basin. (Comparable evaporite beds underlie the Mediterranean.) Due to the current inflow of fresh water, the Caspian Sea is a freshwater lake in its northern portions, and is most saline on the Iranian shore, where the catchment basin contributes little flow. Currently, the mean salinity of the Caspian is one third that of Earth's oceans. The Garabogazköl embayment, which dried up when water flow from the main body of the Caspian was blocked in the 1980s but has since been restored, routinely exceeds oceanic salinity by a factor of 10.
Water (1985 film)
The story is set in the fictional Caribbean island and British colony of Cascara. Widely ignored by the British Government, media, and general public, local Governor Baxter Thwaites is having an easy life in his small and peaceful colony. That peace is disturbed when an abandoned oil rig starts delivering water - at the standard of the finest table water brands (and laxative companies, as it contains a substance that makes you "shit like clockwork"). Different parties, including Downing Street, the Cascara Liberation Front, the White House, French bottled water producers, and the Cubans take interest in the future of the island and threaten to destroy the cosy way of life enjoyed by the island's inhabitants.