Vienna's public transportation system is well known as one of the best in Europe, and the quaint little streetcars are a cheap and easy option to get where you are going. You can buy tickets right on the tram (make sure you punch them in the blue box to validate) and away you go! The most popular route for tourists is the Line 1 or 2, which takes you through the center ring of town. You'll comfortably pass by all the major sights and be able to hop off and on as you like. A great way to see the best of Vienna!