imaginary place, mythical place - a place that exists only in imagination; a place said to exist in fictional or religious writings

Gehenna, Tartarus - a place where the wicked are punished after death

hellfire, red region - a place of eternal fire envisaged as punishment for the damned

Christian religion, Christianity - a monotheistic system of beliefs and practices based on the Old Testament and the teachings of Jesus as embodied in the New Testament and emphasizing the role of Jesus as savior