A bascule bridge is a type of movable bridge that uses a counterweight to lift one or more sections of the bridge, known as leaves, to allow boats and ships to pass underneath. The design is often seen in urban areas where waterways intersect with roadways, providing a practical solution for both vehicle and marine traffic. These bridges are typically operated using hydraulic or mechanical systems, making them efficient for quick openings and closings. Famous examples of bascule bridges include the Tower Bridge in London and the Chicago River bridges in Illinois, which showcase the engineering capabilities of this bridge type.