The so-called "Wien-Karte" (Vienna Card) can be bought for 15.25 Euro at the airport, Tourist Information Offices, and hotels. Its advantages:

• Unlimited free travel by subway, bus (excluding night buses), and tram for 72 hours.

• Vienna Airport Lines, shuttle bus from the airport to the city center and vice versa, for 5 Euro instead of 5.80 Euro.

• Reductions or benefits at 150 museums, sights, theaters, concerts, shops, restaurants, cafés, and Heurigen (wine taverns).

From outside Vienna, you can buy the card on the phone and pay by credit card. Call this number:
++43 - 1 - 798 44 00 - 28