A covered bridge is a type of bridge that has a roof and walls on its sides, providing shelter for the structure and its users. These bridges were commonly built in the 19th century, primarily in the United States and Europe, to protect the wooden components from weather damage. The design often features a truss system, which helps support the weight of vehicles and pedestrians. Covered bridges are often found in rural areas and are considered historical landmarks. Many have become popular tourist attractions due to their picturesque appearance and connection to local history. Some famous examples include the Old West Barn and the Cornish-Windsor Bridge in the United States.