This wonderful café is located on the grounds of the tower, next to the National Library and the Hofburg Imperial Palace. Featuring some impressive and exotic plants, this greenhouse was built in the 19th century and was originally intended to be used as the emperor's summer greenhouse at the time. Now it is a more than wonderful café, and it serves the most delicious Austrian cuisine, including: salmon, schnitzel, pasta, calamari, sausages, fried eggs, cucumber soup, various salads and much more. It is a nice place to enjoy a cup of coffee, tea or any other beverage of your choice.