Ключевые слова: adventure, asia, background, beautiful, boat, cave, caves, dark, entrance, excursion, geological, geology, grot, grotto, heritage, inside, landmark, landscape, limestone, mountain, mysterious, national, nature, ocean, palawan, park, philippines, princesa, puerto, river, rock, sabang, sail, sea, seven, stalactite, stalagmite, subterranean, tourism, tourist, travel, tropical, unique, water, wonders, world,