Ключевые слова: 60 million years, adventure, ancient, ancient ages, architectural column, arranging, below, cave, dripstone, eco tourism, eroded, exploration, famous place, fantastic, feature, formation, geology, glacial, glacial period, horror, illuminated, inside of, karst formation, limestone, luray, luray caverns, mineral, mystery, national park, natural column, nature, outdoors, reflection, rock object, speleology, spelunking, spooky, stalactite, stalagmite, stone object, subterranean, tourism, travel, travel destinations, turkey, underground, vacations, water,