Cunca Wulang is a canyon and waterfall area inland from Labuan Bajo, reached by road through the hills and then on foot with a local guide. The river cuts through pale rock, with pools that can be swimmable when the water level and current are safe.
This is not a polished waterfall stop. Access, fees, and guide arrangements can vary, and conditions change after rain. Go with someone local, wear shoes that can get wet, and do not jump or swim unless the guide confirms the depth and current.