Ключевые слова: adventure, background, beautiful, beauty, cave, cavern, dark, deep, drawing, entrance, environment, explore, fantasy, geology, green, ground, hike, hiking, hole, hollow, inside, landscape, light, mine, mountain, natural, nature, outdoor, outdoors, outside, rock, rocky, scene, scenery, scenic, shadow, sky, speleology, stone, summer, sunlight, tourism, trail, travel, trees, tunnel, underground, view, wild, wildlife,