The Great Seto Bridge or Seto Ohashi Bridge is a series of double deck bridges connecting Okayama and Kagawa prefectures in Japan across a series of five small islands in the Seto Inland Sea. Wikipedia
Its total length is 12.2 km (7.6 miles), and it consists of three main suspensions-the longest being the central span of Minami Bisan-Seto Bridge, at 1,118 metres (3,667 feet). The Seto Great Bridge took 10 years to build and was opened on April 10, 1988.