eldritch 
この世の物とは思われない, 不可思議な, 気味の悪い
1.eerie; weird; spooky.
Citations for eldritch
We boys used to overrun the place, and I can still recall my youthful terror not only at the morbid strangeness of this sinister vegetation, but at the eldritch atmosphere and odor of the dilapidated house, whose unlocked front door was often entered in quest of shudders.