The Red Tower is the location of Entry #5, Entry #21, and Version. It is where Jay found the tape containing the footage shown in Entry #22. Jay's trip to the red tower was the subject of the Winter Solstice Twitter Watch.
Heavy audio and video distortion can be found at the red tower and locations near it. The Operator symbol is visible on the side. In Entry #21, Jay goes inside the red tower and climbs to the top.