Seonbawi, the standing rock on the Taehwa River, and the nearby Simnidaebat bamboo grove show Ulsan at its most scenic and least industrial. The river landscape is calm, green, and photogenic, a useful balance to the city's shipyards and factories.
Come for a walk along the river paths and let the bamboo, water, and cliffs slow the pace down. It is an especially good stop if you want nature within reach of the city without committing to a mountain hike.