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, creating an opening in the center. Drawbridges are often found in areas with waterways, where they help connect land while accommodating maritime traffic. These bridges are operated using mechanical systems, which can be powered by electricity, hydraulics, or manual labor. Drawbridges are commonly seen in cities with rivers, such as Amsterdam and Chicago, where they play a crucial role in transportation and navigation.