The Earth Kingdom is the largest and most diverse of the four nations, its people strong and proud. Some of them Earthbenders. Their land is a massive continent in the eastern hemisphere and several islands. The Earth Kingdom is extremely diverse, having mountainous, forested, grassland, desert and man-conquered areas, including the vast megacity Ba Sing Se. Due to its people's bending ability, the Earth Kingdom could create magnificent structures out of stone such as the city Omashu.
The Earth Kingdom is run overall as a monarchy, the capital being Ba Sing Se. However, it is apparent that there are smaller regions and cities with their own rule, such as Omashu.