Vienna Grand Apartments DANUBE's quiet location gets high marks from our customers. During your stay, you'll be connected to the convention centre and just a quick walk from Alte Donau. You'll find features such as free WiFi in public areas, plus a 24-hour gym and a rooftop terrace. This 4-star apartment has 8 apartments over 6 floors. Enjoy your stay with amenities like free WiFi and a kitchen in each apartment.