An observatory overlooking the Shinano River and the Sea of Japan. This tower is part of the Niigata Minato Tunnel, the only underwater tunnel on the Shinano River. This submerged tunnel opened in 2002.
This observation tower overlooks the Shinano River and the Sea of Japan. This tower is part of the Niigata Port Tunnel, the only underwater tunnel in the Shinano River. This immersed tube was opened to traffic in 2002.