A corn storage facility is commonly referred to as a SILO, which is a four-letter word. A SILO is a structure typically made of concrete or metal that is used to store large amounts of grain, such as corn, for long periods of time. The structure is usually tall and cylindrical in shape, with a wide opening at the top and a smaller opening at the bottom. Silos are designed to keep the grain dry and safe from pests and other contaminants.