"And the whole valley of the dead bodies and of the ashes, and all the fields as far as the Brook Kidron, to the corner of the Horse Gate toward the east, shall be holy to the Lord. It shall not be plucked up or thrown down anymore forever." 
(Jeremiah 31:40) You shall have a song as in the night when a holy festival is kept, and gladness of heart as when one goes with a flute, to come into the mountain of the Lord, to the Mighty One of Israel. The Lord will cause His glorious voice to be heard, and show the descent of His arm, with the indignation of His anger and the flame of a devouring fire, with scattering, tempest, and hailstones. And in every place where the staff of punishment passes, which the Lord lays on him, it will be with tambourines and harps; and in battles of brandishing He will fight with it. For Tophet (Tophet = Hinnom, Jeremiah 7:31) was established of old, yes, for the king it is prepared.  (Isaiah 30:29-30, 32-33a) There is a reason for our choice of the Hinnom Valley as chief venue for the ICZC celebration during the Feast of Tabernacles. This is the place, according to the prophetic Word of God as recorded in Jeremiah 31:40 and Isaiah 30:29-30, 32-33a, and also according to the testimonies of several believers, where the Lord will do a great work and begin to pour out a double portion - the former and the latter rains - of His Holy Spirit.