There are two festival-exclusive tours - one in the tea garden in the UK, and one that covers what goes into putting the festival together. And there are a couple of playgrounds that aren't there year-round. But that's it. And it was much more elaborate in the past, with the festival center and seminars and presentations. I still have an azalea in my yard from a gardening seminar I went to during the festival in 2013... The TSA guys gave me such a strange look, taking a totebag with a potted plant as my carry-on on the flight home!