Kirosan Observatory Park on Oshima Island has some of the best views along the Shimanami Kaido, a cycle route over the Seto Inland Sea. Built on Mt. Kirosan, over 300 m above sea level, the observatory offers views of the islands of the Seto Inland Sea and the bridges that connect them. The observatory is designed by world-renowned architect Kengo Kuma. It blends into its surroundings and conforms to the natural shape of the mountain. There is a shop next to the parking lot at the base of the observatory where you can buy souvenirs and refreshments.