Doc - The Great American Cowboy (1973)
Doc - Journeys From Beyond Earth (1975)
Eyebrow-raising doc from the mid-70s on the evidence for alien life on Earth
Doc - Erich von Daeniken: Chariots Of The Gods (1972)
the ancient mysteries of the world - pyramids, cave drawings, Easter Island, etc. - and their maybe extraterrestrial origins! a classic with music by peter thomas!
All 5 of Matthew Barney's groundbreaking Cremaster Cycle films, including supplemental documentaries, interviews and curated video.