All mountains on Java have their waterfalls, Welirang volcano is no exception. Close to Trawas I visited Dlundung waterfall, height 23 m. It is easily accessible by a paved path. On holidays there will always be visitors. Yet for Indonesian standards the place was reasonably clean. One can wade in the pool, but it is not deep enough for a good swim.
We think the best aspect of Dlundung waterfall are its surroundings. From the pool a steep path leads up into the forest above the fall. Along the path one has some good views of the valley and of the waterfall itself. I followed it for half an hour in search of the source, and got as far as where the river was a small rivulet. Near that spot villagers were trying to catch birds with one bird in a cage as lure.