a river flows over a rocky riverbed formed by lava sedimentation at lava bantal, yogyakarta, indonesia

water rock nature stream river rapid reflection leaf waterfall sea wilderness geology wildlife wave watercourse shore autumn tree flows rocky riverbed formed lava sedimentation bantal yogyakarta indonesia unique geological formations create striking natural landscape abstract beautiful blue camping clean clear energy environment environmental farm flow forest formation fresh geology green habitat healing hiking hill indonesia landscape mountain roads natural nature outdoor path pristine rapids resource river riverbed road rocky sedimentary rock side stone summer tourism tracking tree unique vacation valley water falling falls waterfalls wave