It's about half an hour drive from Philadelphia and it really worth my time. I recommend checking the official Web site for exhibitions and performances because there's always a great choice of events to fit many different needs. When I had been there in last september the Light Installations by Bruce Munro were a main event, that was a very special exhibition of amazing and colorful lights installed all across a large area of the Gardens. It had been so amazing becasue it gave to the gardens a sort of unreal atmpshere, sustained by an inspiring music coming from the backgrounds. Btw the all park itself is amazing, and just walking around the marvellous flowers and plants was a great pleasure, benches were everywhere to stay and enjoy the nature around. A great and renowned botanical garden is also an important piece of the Gardens and it included a number of exotic plants which I had seen ever since.