Take an undemanding walk through the Viennese Forest to the top of this hill and relish the views over the whole city. The hill is about 480 meters tall and there is a restaurant and a coffee shop on the top, so you can refresh yourself there. It takes about 30 minutes of traveling to get here by public transport.
Wikipedia https://en.wikipedia.org/wiki/Kahlenberg
Address 1190 Vienna, Austria
Coordinates 48°16'34.83" N 16°19'59.044" E