The Rock Of Ages

Long ago when the being that created the Universe remained a physical being, his feet rested on a large planetoid composed of dark matter. When he lost his physical form, the planet was blasted to pieces as part of the Big Bang. Only the place where his heels touched remained. This became the Rock of Ages, the anchor point that serves as the beginning of history for most races.

The Rock of Ages is unimpressive, barren and uncomfortably cold. However it is a multiversal constant, a point from which travellers may calibrate their navigation equipment. Since this is an essential step for time travellers and those crossing dimensions, it has been visited many times.