In the castle garden, Palmenhaus restaurant has a separate tropical plant greenhouse built in 1900. The greenhouse is divided into two parts, one is the tropical butterfly warm house, the other is the cafe and restaurant. Palmenhaus address : Burggarten 1, 1010 Vienna, website: www.palmenhaus.at. Per capita about 14-30 euros. We are eating lunch in this greenhouse restaurant~ The whole restaurant is full of floor-to-ceiling glass, there are many plants in the restaurant, there are tropical plants and fresh flowers, the environment is elegant, just like being in a tropical jungle, don't have fun.