The Krosven Steppe
A turbulent ocean that acts as the eastern boundary of Iro. Contains the Yonavi, a series of populated islands. Beyond that are violent storms that clash relentlessly, making it impossible for sailors to travel farther out. Because of this, Irolean shipbuilding has been stunted, evolved to be more for short trips between the Yonavi and the mainland, and for river trips, than for any lengthy trips over the ocean. Regardless, people have tried traverse the ocean, and none have ever returned.