The hills containing the Marabar Caves are older than anything else on earth. The rocky hills thrust up abruptly from the soil and resemble nothing else in the surrounding landscape. Each cave has a narrow entrance tunnel that leads to a large, dark, circular chamber. If a match is lit inside the caves, its reflection appears clearly in the polished stone of the cave walls. The caves seem to embody nothingness; their reputation spreads not just by word of mouth, but seemingly through the earth itself or through the animals. On the highest hill of the rock formations precariously rests a large boulder, which is thought to be hollow. The hill is called Kawa Dol.