The Seto Ohashi Bridge is a series of bridges connecting the islands of Honshu and Shikoku in Japan. It spans approximately 13.1 kilometers (8.1 miles) over the Seto Inland Sea, making it one of the longest bridges in the world. The bridge system includes several different types of structures, including suspension and cable-stayed bridges. Opened in 1988, the Seto Ohashi Bridge serves both road and rail traffic, facilitating transportation between the two islands. It is an important part of the Honshu-Shikoku Highway and is known for its scenic views, attracting tourists and photographers alike.