Poenari Castle on Mount Cetatea, Făgăraș Mountains, Romania

© porojnicu/Getty Images - 2020-10-11

mountainous landforms mountain natural landscape nature mountain range highland sky vegetation hill station wilderness valley green alps nature reserve hill biome ridge mount scenery tree national park landscape forest cloud terrain valdivian temperate rain forest mountain pass river tourism massif fjord rock fell plant ravine tropical and subtropical coniferous forests escarpment temperate broadleaf and mixed forest rainforest