A new viewing platform will open on the 15th August at the Rudolfstrum restaurant above the village of Hallstatt. I was up there recently watching them build the foundations for the platform.
For those who know the restaurant you get amazing views from the terrace of Lake Hallstatt.
The platform is just below the terrace. It's been dropped into position by Helicopter.
The food is very good as well. :-)
You can walk up to the Rudolfstrum or just take the funicular up from the village.