Ключевые слова: adventure, apuseni, archeology, bats, cave, cavern, caving, chamber, cold, crystal, dark, deep, discover, entrance, environment, europe, expedition, explore, gallery, geology, glacier, green, hiking, ice, icicle, limestone, melting, miner, minerals, mountains, natural, nature, nature park, outdoor, protected, rock, romania, snow, speleology, stairs, stalactite, stalagmite, stone, summer, tourists, trail, travel, underground, white, winter,