Far Tower
From Halopedia, the Halo wiki
The Far Tower was a Covenant tower on the orbital city High Charity. It featured some Holo-Pedestals, a Gravity Lift, and three landing pads for Phantoms. This is where the High Prophet of Truth boarded a Phantom to reach the Forerunner Dreadnought and where the High Prophet of Mercy was attacked by a Flood Infection Form. It was connected to the Mausoleum of the Arbiter by a solitary bridge.
In Halo 2 It is the first location you appear in on the level High Charity. A Pelican crashes and Flood Combat Forms emerge from the wreckage, followed by Brutes from a door to combat the Flood. This is also a place where Flood Juggernauts were supposed to spawn.