a giant granite boulder covered with green, brown and rust colored moss and lichen amidst giant sequoia trees

towering trees full grown sequoias giant sequoiadendron giganteum coniferous redwoods cupressaceae forest sequoia national park california usa united states america nature outdoors summer woods tourism travel vacation hiking adventure environment ecosystem ecotourism sight exploring conservation large huge detritus ground landscape boulder geology moss lichen green rust brown granite rocks twigs covered colored rock tree woodland wilderness trail plant autumn grave ruins stream wood trunk leaf