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 Prophet of Truth boarded a Phantom to reach the Forerunner Ship and where the Prophet of Mercy was murdered 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.