Read Joel 3: 11-14 to start. 11 Assemble yourselves, and come, all ye heathen, and gather yourselves together round about: thither cause thy mighty ones to come down, O LORD. 12 Let the heathen be wakened, and come up to the valley of Jehoshaphat: for there will I sit to judge all the heathen round about.13 Put ye in the sickle, for the harvest is ripe: come, get you down; for the press is full, the fats overflow; for their wickedness is great. 14 Multitudes, multitudes in the valley of decision: for the day of the LORD is near in the valley of decision.
Let’s talk for a moment about geography. Not about nations and borders, but about land, and topography, the actual surface of the earth. Ever look at a topographical map? It’s a map that shows the land features rather than the political lines, showing the height of hills and mountains, that sort of thing. When you think about valleys, that’s the sort of geography we’re talking about.