While technically not endless, the plane of Ravarus is so massive it can take decades of travel to reach one continent to another. There is a known phenomenon amongst sailors that venture a few hundred miles away from shore that makes them lose their ability to navigate. The stars change, the waves grow, and the wind seems to blow in two directions leading to confusion and disorientation. It is because of this phenomenon that venturing away to new lands is considered madness.
Expertise in Arcana and proficiency in Water Vehicles is required to know this secret.
Expertise in History and knowledge of the First Men is required to know this secret.