Hellmouth

Hellmouth is both the name for the gate to hell, which plays a role in many religions, as well as a colloquial term for a volcanic vent.

The name in connection with volcanoes comes from the fact that it was once thought to hell along with the red-hot fires of hell lies beneath the earth's surface, so that the volcano was the entrance. In the Middle Ages, especially the Icelandic volcano Hekla had a reputation straight to lead to hell. " Because Iceland was once in the entire Christian world because of its frequent volcanic disasters as the residence of the devil. And Hekla as the front door to hell. "