The Strangeness (1985)

A band of adventurous young miners disregards warnings from seasoned prospectors and descends into the treacherous Gold Spike Mine, hoping to strike it rich. As they explore the dark, winding caverns, they quickly discover that their quest for gold is futile. However, they soon come to an alarming realization: they are not alone in the depths of the mine. The eerie atmosphere and lurking dangers turn their expedition into a chilling fight for survival against an unknown menace.