Saikai National Park in Sasebo looks out over the Kujukushima islands and is a place to walk around observation points and coastal scenery. Nearby shops sell hamburgers, ice cream, and flying fish ramen, and you can also take a Kujukushima sightseeing boat. From the observation points you can look down over Sasebo city and the sea, and there are gun battery ruins, toilets, and vending machines. The route includes uphill sections and stairs, so the walking distance is long.