A drawbridge is a type of movable bridge that can be raised or lowered to allow boats and ships to pass through. It typically consists of a bridge deck that pivots or lifts vertically, creating an opening in the center. Drawbridges are commonly found in areas with waterways, where they help manage both road and water traffic. These bridges are often operated using mechanical systems, which can be powered by electricity or hydraulics. Drawbridges are important for maintaining transportation routes while accommodating the needs of maritime navigation, making them essential structures in cities with rivers or canals, such as Amsterdam or Venice.