The "Atlas"

Alice Springs              23.42S  133.52E Pg 162
Bondi                      33.53S  151.17E Pg 274a
Brisbane                   27.28S  153.02E Pg 171a
Broken Hill                31.57S  141.27E Pg 166
Burnie                     41.04S  145.54E Pg 166
Canberra                   35.17S  149.08E Pg 171b
Charleville                26.24S  146.15E Pg 166
Chatswood                  33.48S  151.12E Pg 274a
Dacca                      23.43N   90.25E Pg 126
Harrisburg                 40.16N   76.53W Pg 208
Hiroshima                  34.24N  132.27E Pg 96
Hobart                     42.53S  147.19E Pg 166
Kakadu (Nat. Pk.)          13.00S  132.45E Pg 164
Kintore (Mt)               26.34S  130.30E Pg 162
Kosciusko                  36.27S  148.16E Pg 171b
Lismore Road               28.48S  153.17E Pg 166
    or                     37.58S  143.20E Pg 169
Mallee (Cliffs Nat. Pk)    34.15S  142.40E Pg 166
Mandalay                   22.00N   96.05E Pg 110
Manhattan                  40.46N   73.55W Pg 276
Maralinga                  30.10S  131.35E Pg 162
Michigan                   48.01N   98.07W Pg 198
Norfolk Island             29.02S  167.57E Pg 174c
Roma                       26.35S  148.47E Pg 166
Somme                      49.55N    2.30E Pg 50
Sydney                     33.52S  151.13E Pg 170
Warburton                  26.07S  126.35E Pg 162
    or                     37.46S  145.41E Pg 169
 (Abor. Res.)              26.20S  127.00E Pg 162
    or                     24.00S  128.15E Pg 162
 (Creek)                   27.55S  137.28E Pg 166
Wollombie                  32.56S  151.09E Pg 170
Yuendemu                   22.16S  131.49E Pg 162
 (Range)                   23.25S  129.20E Pg 162
 (Abor. Res.)              22.20S  131.47E Pg 162

Notes :-

Nat. Pk. - National Park
Mt. - Mount
Abor. Res. - Aboriginal Reserve

Like I've said, this is by no means a definitive record of all places mentioned in the M.O. albums. If you know of others please mail them to me.
Also, the locations are open to interpretation - for example Lismore Road could be in Australia (as shown above). But Lismore also appears numerous time in an atlas - usually in Ireland. There are many places in Ireland called Lismore - my school being one. (Lismore is Gaelic for "Big Fort")