This sounds pretty interesting...a garden is opening up in the UK featuring poisonous and psychotropic plants from around the world. It seems like the goal is to educate people about the fact that plants are so powerful, and that many of the worlds drugs and chemicals come from the plant kingdom. Wish we could have something like this in the U.S.
http://news.bbc.co.uk/1/hi/england/tyne/4303661.stm