Caspian adventures
There are vast oil reserves under the Caspian and swimming in its waters are giant caviar-bearing beluga sturgeon. Both riches have been the subject of disputes between the nations that claim a share of the Caspian and some of these disagreements centre on just how one defines these waters - as international ocean waters or inland sea or lake?
Image 1 of 3: The Caspian Sea, as viewed from Baku in Azerbaijan. Photo / David Chamberlain