adventure, archipelago, badlands, barren, bartolome, biosphere, conservation, crater, desolate, discover, ecology, ecuador, evolution, explore, formation, galapagos, geology, hill, iron, island, landscape, lava, lifeless, magma, martian, mountain, mountainous landforms, natural beauty, natural habitat, outcrop, puerto ayora, ridge, rock, rocks, santiago, soil, south america, travel, volcanic, volcano