Visit one of the oldest salt mines in the world at Hallein near Salzburg its salt provided a livelihood for local people brought riches to the archbishops and built the magnificent city of Salzburg we admire today

Please fix the punctuation.
Visit one of the oldest salt mines in the world at Hallein near Salzburg: its salt provided a livelihood for local people, brought riches to the archbishops and built the magnificent city of Salzburg we admire today.