Region
From MHWiki
The world of MouseHunt is composed of individual regions. Within each region are unique hunting locations. Hunters begin in the Gnawnia region, eventually progressing into the Valour, Whisker Woods, Varmint Valley, Burroughs, Furoma, Bristle Woods, Rodentia, Tribal Isles, Sandtail Desert, Queso Canyon, Rift Plane, and Hollow Heights regions by collecting and repairing Maps and Keys.
To move to a new hunting location within the game, click on the TRAVEL button. The map will show all your unlocked locations, as well as any special considerations of note in a specific location. It will also show the minimum rank required to hunt in that location.