The Wicker Man (1973)
A folk-horror-musical (!) about official mainland law and religion pitting its powers against vernacular and insular paganism – how very alternative and 70s! A puritan intruder is slowly engulfed by the carnal peculiarities he encounters trying to solve a mystery in a remote and weird corner of the world.
This could well have been a minor masterpiece. Instead, it wobbles precariously in the insecure vicinities between the sublime and the ridiculous, unfortunately taking the wrong turn all too often. Not in my book, alas.