Final Fantasy Infinite
Dividing the Miasmic Continent not-so-neatly in half is the Axis River. Said river is inaccurately named – rivers flow downhill from a source, while the Axis runs from ocean to ocean and is thus a strait. Practically speaking, however, this distinction is moot, for two reasons. First, due to prevailing winds and Coriolis effect from the planet’s rotation, there is actually a constant current from the northeast to the southwest. Second, and much less explicably, saltwater becomes freshwater as it enters the Axis. Since it’s situated so closely to the “mouth,” Cocoon’s Crystallis is commonly believed to be responsible.
Speaking of Cocoon, the city uses the Axis for shipping goods downstream and also offering safe, easy transport of paying passengers. Its main receiving port is down at Dali, which sends the goods along with their own produce caravans to Narshe and Lindblum. A secondary port is at Midgar, utilized primarily by Treno.
Curiously enough, no mention of the Axis River can be found from before the Crystal War. Most scholars explain this away as the result of poor recordkeeping and a scarcity of prewar knowledge, but a handful believe that the powerful magics unleashed during the war actually split the continent in two, with the Axis as the fracture line.