You have to synthesis it. It's not naturally occuring. Dr. Albert Hoffman was the first to do this. He was a swiss scientist studying the effects of Ergot poisoning. Ergot is a fungus that attacks various grains such as rye. (this is how they believe the salem witch trials started, but that is a story for another time) Anyway he was experimenting with derivitives of it and one of them was lysergic acid deithylamide (lsd). That day he realized he was feeling giggly and dizzy, he realized it was because of the lsd. The next day he injected himself with 250 micrograms directly into his blood stream(which is a lot, that's a quarter of a millgram!). He rode his bicicle home that day and said the entire world was morphing around him. This scared him a little bit but once he got home he relaxed and enjoyed it. When he closed his eyes he saw the world famous psycodelics (sorry if that's the wrong spelling). The next day when he woke up he noted in his journal that his breakfast was especially delicious and he walked out into his garden and found a deep appreciation for it. any way i'm not sure if u wanted a full history or anything, just if your not an accomplished chemist, creating lsd is out of your reach. Some advice though, if you're young don't do it. Mind can break your attatchment to the real world and you'll have a bad trip for several hours. You have to be mentally ready to do it and totally confident that you want to, and do it in good company. Good luck, be safe, don't jump out of any windows, and enjoy (if at an appropriate age)