About 35km northeast of Tenterfield (take Naas Rd, signposted 'Woodenbong' – really), you can hike to the top of Australia's largest exposed granite monolith (which looks like a stripy little Uluru). There are lovely walks in the area (including two routes up the rock for great views), plus picnic sites and a camping area (adult/child $10/5) near the base. Kangaroos and birdsong are highlights.
