Bouken no Mori in Oji

Bodai Camping Ground seems to appear out of nowhere, in the middle of a residential area.
It's in the middle of the city, so it's easy to get to, and it's right next to Hatakeda Park, so you can enjoy the natural scenery all year round.
Bouken no Mori (Adventure Forest) combines a BBQ area, a camping ground, and other amenities, and has two courses for adventures among the treetops, as well as an incredible zipline over a pond at the end, which is over 150m long.