Situated in the Kensington Gardens, I definitely felt a sense of superiority and highness. 
The Orangery, as its name suggests, is a place which is surrounded by fruit trees and gardens, producing an elegant and comfortable atmosphere. What amazed me of the Orangery was its Victorian architecture, I at first thought it was the place where the Royal family lived. But I proved I was wrong, it indeed was a place serving afternoon tea, pastries and cakes, as well as lunch (though they were mainly in a small portion comparing with other restaurants).
I picked the Pimms afternoon tea, which was the most ordered and popular option. 
The Orangery generally is famous for its high tea. If you pay a visit to Kensington Gardens, it is highly suggested to have a try at this British food or you will regret a lot.