Eco Park Ronshohara - Vacation STAY 41985v offers accommodations in Unzen, 15 miles from Shimabara Arena. With free private parking, the property is 5.3 miles from Unzen National Park and 13 miles from Kuchinotsu Harbor. The accommodation is non-smoking. The campground is located in a geothermal area, with a number of hot springs for guests to relax in. The nearest airport is Amakusa Airport, 24 miles from the campground.