Hidden treasure/Australia

Australia
Australia has only one (1) type of hidden treasure; Mines.

Mine
Mines have four (4) sizes; Coal ( Small ), Iron ( Medium ), Gold ( Large ) and Diamond ( Extra Large ). Each size requires various amounts of Mining Keys or  Mining Pickaxes to be uncovered.

Coal Mine
Coal Mines: have three (3) stages of progression as you work to uncover them:

Coal Mine
 * Requires 10 Mining Key-icon.png Mining Keys to be opened.
 * Give you when they are fully opened.


 * Slideshow

Iron Mine
Iron Mines: have three (3) stages of progression as you work to uncover them:

Iron Mine
 * Requires 22 Mining Key-icon.png Mining Keys to be opened.
 * Give you when they are fully opened.


 * Slideshow

Gold Mine
Gold Mines: have three (3) stages of progression as you work to uncover them:

Gold Mine
 * Requires 28 Mining Pickaxe-icon.png Mining Pickaxes to be opened.
 * Give you when they are fully opened.


 * Slideshow

Diamond Mine
Diamond Mines: have three (3) stages of progression as you work to uncover them:

Diamond Mine
 * Requires 42 Mining Pickaxe-icon.png Mining Pickaxes to be opened.
 * Give you when they are fully opened.


 * Slideshow