'Valley' in the Bible

In that day, great is the mourning of Jerusalem, As the mourning of Hadadrimmon in the valley of Megiddon,

And stood have His feet, in that day, On the mount of Olives, That is before Jerusalem eastward, And cleft hath been the mount of Olives at its midst, To the east, and to the west, a very great valley, And removed hath the half of the mount towards the north. And its half towards the south.

And ye have fled to the valley of My mountains, For join doth the valley of the mountains to Azal, And ye have fled as ye fled before the shaking, In the days of Uzziah king of Judah, And come in hath Jehovah my God, All holy ones are with Thee.