What valley is below Mount Carmel, and what will happen there?
The valley below Mount Carmel is the valley of Jezreel, also known as the valley of Armageddon. It lies just south of present-day Haifa. In this valley, the final great battle will be fought someday, according to the biblical context.
Les explains that this setting involves Elijah during the reign of wicked King Ahab and Queen Jezebel in the northern kingdom. They promoted Baal worship, and the Israelites were falling for it. Elijah caused a three-year drought. At the end of that drought, Elijah gathered all the Israelites and the prophets of Baal together on Mount Carmel. When you drop off Mount Carmel, you go down to the valley of Jezreel, also called the valley of Armageddon, where the final great battle will be fought someday.