AM radio towers are tall structures used to broadcast AM radio signals over long distances. They work by transmitting audio signals through electromagnetic waves, which can travel far and wide, especially at night when atmospheric conditions change. These towers are typically made of metal and can be several hundred feet tall. The height helps the signals reach a larger area, allowing listeners to tune in from various locations. AM radio is commonly used for news, talk shows, and music, making these towers essential for communication and entertainment.