The Pinnacle of Heaven is a zone found in Act IV of Diablo III. It is the last zone before the battle with Diablo in The Crystal Arch. After leaving the Silver Spire Level 2, the Nephalem enter(s) this zone. The Pinnacle is a very small zone. Once inside, it starts the scripted scene with Tyrael and Imperius. There is also a Waypoint to the right. Whatever preparations for combat one wants to make must be made here, for immediately after entering the Crystal Arch, the non-portal zone begins.