同步萤火虫，大烟山国家公园，田纳西州，美国

tree outdoor landscape nature plant nature reserve forest jungle state park rainforest water natural landscape creek old-growth forest grass mountain riparian zone woodland river vegetation waterfall watercourse stream mountain river riparian forest wooded fall sky autumn biome wilderness tropical and subtropical coniferous forests moss ravine water resources fluvial landforms of streams body of water tributary surrounded deciduous grove northern hardwood forest natural environment sunlight yellow national park wood lush land non-vascular land plant arroyo rapid cloud narrow highland