Imagine what it would be like to travel somewhere if there were no bridges. You would run into trouble at the first little stream. Bridges are essential structures that help us cross obstacles like ravines and rivers. When building a bridge, it's important to choose the right materials and design depending on the environment and load. In this film, you'll learn more about different types of bridge construction. Beam bridges, which consist of beams supported by pillars, are a basic and cost-effective type of bridge. Arch bridges, with a history dating back to ancient Rome, give stability through their curved shape. Suspension bridges, like the Golden Gate Bridge, use thick cables to support the bridge deck. Other types of bridges shown in the film include vault bridges, cable-stayed bridges, truss bridges, and movable bridges like drawbridges and swing bridges, which allow boats to pass. So, next time you travel somewhere, look around and see how many bridges you can spot.