One of the hottest places on Earth, 120m under sea level, with lakes of sulphur and iron and apparent absence of life. Could this place had been the inspiration for our idea of Hell?
https://en.wikipedia.org/wiki/Gehenna
Etheopia had one of the earliest Christian communities (that early on split from what became the larger group of Christians) so I could easily imagine Dallol being inspiration for the book of Revelation and/or otherwise influential in forming the Christian idea of hell.