Tourist Information Office - Frankfurt Card Offers & Discounts: Valid within the city districts and Frankfurt International Airport (Zone 50 und 5090) - Free and unlimited travel on Frankfurt's public transport system (tram, bus, underground, suburban trains) - Up to 50% discount on admission to various Frankfurt museums and to the Palmengarten (Botanical Gardens) - 20% discount on admission to the MAIN TOWER - 20% discount on motorised city tours, public city walks, airport tour, river cruises and Segway Tours, TimeRide and rental bikes at Terranova & FrankfurtBikeTour - Disounts on admission to Alte Oper (Old Opera), Schauspiel, Oper Frankfurt (Frankfurt Opera), Schauspiel Frankfurt (Playhouse Frankfurt), The English Theatre and Papageno Musictheater at Palmengarten - Discount on admission to the Frankfurt Zoo and Blacklight Minigolf - Various discounts at participating restaurants and various discounts at participating retail stores