Stock photography, photos: tropical forest with sky Stock photos of distant view of a tropical forest on a hillside with sky Photograph: © Choon Boon Ng Click for a larger image and more information Keywords associated with this stock photo: forest,trees,hill,side,hillside,sky,ecotourism,ecology,ecological,environmental,environment,jungle,sanctuary,trees,green,greenery,variety,various,malaysia,recreational,tropical,tropic,background,texture