Ключевые слова: adventure, arizona, butte, canyon, colorado river, dawn, desert, evening, exploration, geological formation, geology, gradient, grand canyon, grand canyon national park, hiking, hoodoos, layers, light, morning, mountains, national park, nature, oneill, ooh aah point, outcropping, outdoor, plateau, point, pyramid, red, rim, rim to rim, rock, shape, sky, south kaibab, stairs, steep, sunrise, sunset, trail, travel, trees, vast, wilderness, winding,