Vienna, Austria is located on the Danube River and has cold winters and moderate summers. It is home to important cultural institutions like the Vienna State Opera, one of the world's leading opera companies. Schönbrunn Palace is one of Austria's most important historical and cultural sites and a major tourist attraction in Vienna. The city is known for its pastries and sweets like strudel often enjoyed with coffee, as well as traditional foods like goulash stew. Schönbrunn Zoo is the oldest zoo in the world and has been named the best zoo in Europe three times. The Prater park in Vienna offers both entertaining attractions and quiet, relaxing areas with meadows and trees.