The Berlin City Tour Card offers you free travel on public transport in Berlin, but the card also offers you at least 15% discount on 10 attractions in Berlin. The Berlin City Tour Card is available for 48 hours, 72 hours, 4 days or 5 days and can be bought for Berlin only, or Berlin and Postdam (Zone AB incl. Airport Tegel (TXL) vs. Zone ABC incl. Airport Schoenefeld (SXF)).