Cast iron skillets are versatile cooking tools made from cast iron, known for their excellent heat retention and even cooking. They can be used on the stovetop, in the oven, or even over an open flame, making them ideal for a variety of cooking methods, including frying, baking, and sautéing. These skillets require special care, such as seasoning with oil to maintain their non-stick surface and prevent rust. With proper maintenance, a cast iron skillet can last for generations, often becoming a cherished family heirloom.