Heaven

Heaven, sometimes called the Throneroom or the Temple, is the restingplace for the full glory of the presence of God.

Glorious Land
Heaven is the highest dimention. It is the pinnacle of glory and light. It is the dwelling place of the remaining Elder Host and the resting place for the Young Host while they are not on the Triad.

No one has ever seen the highest heaven and returned, accept the angels, who never give a deep description, so little is known about it, except that it is a realm of clouds and light with a palace in the centre. The palace houses two grand doors, which lead to the throneroom of God. It has never been seen by any being save God Himself; even the angels only see or speak with God when He leaves the throneroom and stands the palace entryway.

End of Time
At the End of Time, the three heavens will be joined and God's glory will be for all to see. In John's vision in the book of Revelation, God's throne is surrounded by Elder angels and Governors, and it is in the open for all to see. Thus it is assumed that, after evil is defeated, God's palace will be made into a city with God's throne in the centre, no more seperation between Him and the world.