This small town in the district of Gmunden, in the Austrian state of Upper Austria. Situated between the southwestern shore of Hallstätter See and the steep slopes of the Dachstein massif, the town lies in Salzkammergut region, on the national road linking Salzburg and Graz.
Hallstatt is known for its production of salt, dating back to prehistoric times.
Hallstatt is at the core of the "Hallstatt-Dachstein/Salzkammergut Cultural Landscape" declared as one of the World Heritage Sites in Austria by UNESCO in 1997. It is an area of over-tourism.
To understand the actual impact, image, the majority of Austrian's have not visited due to the massive volume of day-trippers.
My advice would be to stay at Seehotel Grüner Baum.
Enjoy the view from their restaurant right on the lake, and then visit the town after 7 pm or before 10 am.
Then you'll get to experience Hallstatt in all its glorious beauty.