Timescape

The Timescape, A.K.A. the innerverse of SAF's Time Butterfly or that of general Time Butterflies, is how it is possible in a sense to access Alternate Timelines from the Main Timeline as well as traditional time travel. It also includes things like the Time Lord Temples, The Astral Canyons, of which is the literal manifestation of the expression "Mark on History", and the white Time Voids and various forms of Limbo.