house of horrors
Refers to a place filled with terrifying things, often used for haunted-house attractions or metaphorically for a frightening situation.
遊園地の恐怖の館で、友達が悲鳴をあげた。
My friend screamed in the amusement park's house of horrors.
A fixed phrase composed of 恐怖 (fear) + の (possessive particle) + 館 (mansion/hall).