Excellent, undeservedly obscure Spanish giallo full of atmosphere. Featuring great work from the female cast, an effectively creepy setting, and some genuine surprises along the way, it's sort of a cross between Suspiria and Picnic at Hanging Rock. Beware shorter versions mangled by censors to remove "disturbing" but key plot elements.

Uploaded in HD for you fine folks here:

https://ok.ru/video/11986239359538
https://vkvideo.ru/video864736629_456242570
(please PM me if the links stop working)