Movies about hippies?

[grade4]

I was wondering if anyone had any suggestions for documentaries, preferably from the late 60s, about hippies, Hare Krishna movement, acid trips, etc. I saw "Revolution" (1968) during the summer and it was really good! They mention the Beatles going to India, which is what made me watch it Are there any other movies like that? Thanks in advance for your responses!

Info about "Revolution": http://www.metroactive.com/papers/metro ... -9629.html