There is one place named Castle Island in Australia.
All places in the world called "Castle Island".
Gladstone (5)
Hamilton (5)
Kingston (5)
Rosedale (4)
Richmond (4)
Gordon (4)
Windsor (4)
Newstead (4)
Cremorne (4)
Springfield (4)
Woodstock (4)
Darlington (4)
Warburton (3)
Williamstown (3)
Middleton (3)
Sassafras (3)
Somerton (3)
Wattle Flat (3)
Black Springs (3)
Flinders (3)
Huntly (3)
Auburn (3)
Clarendon (3)
Derby (3)
Epping (3)
Georgetown (3)
Melrose (3)
Rosebery (3)
Waterloo (3)
Bangor (3)