The term "The Great Valley" is often associated with eschatological themes in biblical prophecy, particularly in the context of the end times and the return of the Messiah. This concept is primarily derived from the prophetic writings of the Old Testament, where it is depicted as a significant geographical and spiritual event.

Biblical References:

1. Zechariah 14:4-5 : The most direct reference to a great valley is found in the book of Zechariah. The prophet describes a future day when the Lord will stand on the Mount of Olives, east of Jerusalem. "On that day His feet will stand on the Mount of Olives, east of Jerusalem, and the Mount of Olives will be split in two from east to west, forming a great valley, with half of the mountain moving north and half moving south. You will flee by My mountain valley, for it will extend to Azel. You will flee as you fled from the earthquake in the days of Uzziah king of Judah. Then the LORD my God will come, and all the holy ones with Him."

This passage is often interpreted as a literal and symbolic event, where the physical splitting of the Mount of Olives creates a new valley, signifying a dramatic intervention by God in human history. The valley serves as a place of refuge for the people of Jerusalem, reminiscent of past deliverances.

2. Eschatological Significance: The creation of the great valley is seen as a precursor to the final battle between good and evil, often associated with the Battle of Armageddon. It symbolizes the Lord's direct involvement in the affairs of the world, bringing judgment upon the nations and deliverance for His people.

3. Symbolism and Imagery: The imagery of a valley in biblical literature often conveys themes of judgment, refuge, and transformation. In the context of Zechariah's prophecy, the great valley represents a divine intervention that alters the landscape, both physically and spiritually. It is a place where God's power is manifested, providing a path of escape and a demonstration of His sovereignty.

4. Connection to Other Prophecies: The concept of a great valley can be linked to other prophetic visions, such as those found in the books of Isaiah and Ezekiel, where valleys are depicted as places of renewal and restoration. For instance, Ezekiel's vision of the Valley of Dry Bones (Ezekiel 37) symbolizes the restoration of Israel, while Isaiah speaks of valleys being exalted in preparation for the coming of the Lord (Isaiah 40:4).

5. Theological Implications: From a theological perspective, the great valley underscores the themes of divine judgment and salvation. It highlights the dual nature of God's intervention—bringing both destruction to the wicked and deliverance to the faithful. This duality is a recurring theme in biblical prophecy, emphasizing the ultimate triumph of God's kingdom.

In summary, "The Great Valley" as described in Zechariah is a powerful symbol of God's eschatological plan, reflecting His justice, mercy, and the fulfillment of His promises to His people. It serves as a reminder of the transformative power of God's presence and the hope of redemption for those who trust in Him.