According to a plaque displayed at a viewing deck in the town of Carmen, these geological formations were the result of erosion of limestones which were uplifted above sea level and fractured due to tectonic processes. Another explanation claims that the hills were previously coral reefs that erupted after a geologic shift beneath the waters.Every summer the grass dries up and looks like chocolates, which is why this place is called Chocolate hills. in the rainy season, the grass turns green, which is also pleasant to look at. the air is fresh and you can tell that the place is really beautiful.