Where Canberra is now located was once rich farming land known as Limestone Plains. It was used for both crops and stock.
Canberra was built on sheep farms.
I assume you mean why is telstra tower where it is and why in canberra altogether? There used to be a smaller tv arial ontop of Black Mountain however it needed to be upgraded to cope with Canberra's rapid expansion. So Telstra tower was built as a telcom. tower and as a landmark attraction too. Why in Canberra though? Because that is where it was needed.
Anything built before the 80s
It was built before the war in 1937 and then used in the war as a people carrier. G-M
Before the Golden Gate bridge was built they had to use a Ferry to get across the river(the glolden gate strait)
Australian money - dollars & cents
It is a Catholic Cathedral, built in 1163. Currently it contains the cathedra (official chair) of the Archbishop of Paris.
In the Azores the official currency is the Euro. Before the Euro went into circulation, the official currency was the Portuguese Escudo
They did not exist. They were built during the war.
Stone bridges were built to get over rivers etc, before iron or steel was used.
The Chunnel is a name that was sometimes used for the Channel Tunnel before it was built.
No the Ka'bah was only used a little while after prophet Muhammad built it. Then it was allowed to be used for pilgrimage.