Omashu

After the elimination of bending, it was the earthbending cities that were hit the hardest, seeing as their bending provided them with their very homes. Omashu, whose gates could only be opened by skilled earthbenders, fell into a state of degradation, and although it was shielded from the Equalist's attacks, the economic siege that it endured left it the largest ghost town in the world. Today, no one lives there but nomads traveling through the area.