As to solar thermal power stations (i.e. using parabolic mirrors) the biggest is in Morocco, and most of the rest are in Spain. Australia only ever had the Port Augusta project, which was cancelled. Their may have been experimental projects, but no commercial ones.
Quite a few of these plants have been decommissioned, and a few converted to PV stations. I think the issues are that the technology is expensive, requires large land areas (small plants just cannot produce enough heat) and keeping the mirrors clean a large expense. PV is easy and low maintenance.
Cheaper, low maintenance technologies tend to be more successful. Wikipedia has a few pages on solar thermal power stations.
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