Mount Doom
Coincidentally, before The Lord of the Rings was published, a fictional mountain range of Titan already existed that carried the name "Mount Doom"; this was a major setting in the 1935 science-fiction tale "Flight on Titan" by Stanley G. Weinbaum. This was one of the locations in the Titan portion of Weinbaum's acclaimed "Planetary series". Weinbaum's Mount Doom was alternatively referred to in the tale as the "Mountains of Death", or "Mountains of The Damned"; it was populated by hostile native wildlife such as "Ice-Ants", "Whiplash Trees", pterodactyl-like "Knife-Kites", and the hypnosis-inducing "Giant Titanian Cave Threadworm". The climate of Weinbaum's mountain is described as sub-Arctic, and it is constantly battered by howling ice-needle storms and hurricane-force winds.