Trenzalore

Trenzalore is a terrifying world that is dominated by a massive and deteriorating version of the TARDIS, having grown out of control after the death of the Doctor. It is the graveyard of a battlefield. Worlds and species will battle there. It is the place where the Doctor's enemies come together.

But before the Doctor's enemies arrived, it was a quaint place with a town called Truth, where you cannot tell a lie. After they came, for about three hundred years, it was a battlefield. The inhabitants of truth were amazed by what the Doctor could do. He repaired the children's toys, and defended the town against the series of invaders that attempted to destroy it. But as the years progressed, an all out war would start. The town of Truth would become a desolate war zone.