There are lots of nature in the vicinity of Wakayama city. After beautiful flowers in Spring, you can enjoy walking in the mountains, playing in the rivers, visiting waterfalls and etc..
Oishi Kougen is located in Kimino town and Aridagawa town, southeast of Wakayama city. You can enjoy panoramic view of Kii mountain range at the 800 m altitude. You can also enjoy seasonal flowers there.