Property Location With a stay at CheckVienna – Apartment Karmarschgasse in Vienna (Favoriten), you'll be close to Business Park Vienna and Vienna State Opera. This apartment is within close proximity of Vienna Twin Tower and Swiss Garden.Rooms Make yourself at home in of the guestrooms, featuring kitchens with refrigerators and stovetops. Cable programming and DVD players are provided for your entertainment, while complimentary wireless Internet access keeps you connected. Conveniences include washers/dryers and irons/ironing boards, and you can also request rollaway/extra beds (surcharge).