Binaural is for headphones. Recorded with a dummy head mike, the soundstage/imaging on headphones is incredibly accurate and convincing. There are way too few of these recordings since the early stereo era to satisfy we headphone listeners. In those days "Binaural" was often seen on LP covers.
This album has been with me since it came out. A favorite of mine too.
If you want to look for an unpopular and rare offering from the late Sixties, find Cro Magnon. Not sure about the spelling. Haven't seen it since 1970. A friend and I liked it, everyone else we knew hated it.