An aqueduct is a structure designed to transport water from one location to another, often over long distances. Historically, they are most commonly associated with ancient Roman engineering, where they used a system of arches and bridges to carry water across valleys and uneven terrain. Modern aqueducts can be constructed from various materials, including concrete and steel, and are essential for supplying water to urban areas, irrigation systems, and industrial processes. They play a crucial role in water management and distribution.