donvliet said:The closest to acid would probably be ALD-52, but I haven't had the chance to try it. And then there's the other lsd analogues.
From the Neuro Soup girl's description, ALD-52 sounds as though it might be even more enjoyable than LSD - "just like lsd but without the anxiety" or something.
http://www.neurosoup.com/schedule1/ald52.htm