Isle O' Hags
The Isle O' Hags is the name of the Island that the Banjo-Kazooie games take place on and serves as the hub world in Banjo-Tooie. There is no mention of Isle O' Hags in Banjo-Kazooie. In all of the Isle O' Hags there are Hag1 tracks on the ground which sometimes helps you to where you have to go.
Jinjo Village: As the name suggests this village is home of the Jinjos. King Jingaling's palace is here as well as Bottles' family's house. The grey Jinjo's house was destroyed by the Hag1. The tunnels leading to Bottle's House are also here.
Plateau: Heading further up from the Wooded Hollow you find the plateau. The plateau is is home to Honey B's hive and Glitter Gulch Mine.
Quagmire: Further up there is this small piece of the wasteland that had been polluted by the waste from the nearby Grunty Industries. From here you can also reach Grunty and her sister's lair, Cauldron Keep.