In the blockbuster fantasy series The Lord of the Rings: The Rings of Power, one of the principal antagonists, the wicked Adar, diverted a river into the labyrinth of tunnels under a dormant Mount Doom to trigger an explosive volcanic eruption. This transformed the surrounding landscape into the bleak lands of Mordor—setting up the blighted kingdom of the orcs that features heavily in the Lord of the Rings movies.
Click here for original story, One does not simply detonate a volcano into Mordor: A scientist explains the problems with that Rings of Power episode
Source: Phys.org