Southwest

1.) Fortune teller's temple

2.) Babadi's hidden space ship location

3b.) Android 19 and 20's first appearance

3a.) The Z team battle with the androids (19,20) location

4.) Southern capital

South east

5.) Tenkaichi battle stage

6.) Gyuumaoh (Ox king's castle)

7.) Cell's transformation area

8.) Android 17 and Piccolo's fighting area

9.) Goku's and Krillin training area (Dragonball)

10.) Kame's (Mutenroshi's) house

Central west

11.) Red Ribbon's main head quarters

12a.) Karins tower and  Kami-sama's palace

12b.) Karin's tower post (Bura and Upa's tribe is near here)

13.) Western capital (Capsule corporation is located here) 

14.) Vegita and Goku's first battle

Central east

15.) Palif's army tower (Dragonball)

16.) Toninjinka house (Dragonball)

17a.) The Son's family house

17b.) Grandpa Son Gohan's house

18.) Satan city (Orange star high school is located here)

North west

19a and b.) Stolen Time machine (Cell traveled in)

20.) Fat Buu's house

21.) Gingertown (Cell's first appearance)

22.) Goku and Vegita's (under Majin magic) battle area (during the Buu saga) 

23.) Cell game stage

24.) Central capital (World King's fortress is located here)

North east

25.) Dr.Gero laboratory

26.) Northern capital

27.) Vegita and Android 18 battle location

28.) Shop where Android 18 replaces her close

29.) Raddiz first landing area

30.) Eastern capital 

31.) Unknown