Lost Continent
The Lost Continent is the frozen north, where Esto Gaza guards the way to Mount Gulug. Everything on it is listed below, and every entry has a map showing exactly where it is.
Towns and Dungeons
The places you walk into.
Regions
The stretches of the world map you cross as you travel between different locations. These are the names the Bestiary uses when it tells you where an enemy lives, and the only place the game itself names them is the menu screen, so each one has a map here.