Ключевые слова: activity, adventure, aquatic, background, beautiful, calcareous, cancun, cave, cavediving, cavern, caving, cavity, cenote, diving, down, earth, exploration, exploring, flowstone, formation, fresh water, grotto, hole, holiday, hollow, immersion, limestone, maya, mexico, nature, outdoor, playa del carmen, research, riviera, scenery, scenic, scuba, speleology, stalagmite, submerged, sweet water, travel, tropic, tropical, tulum, tunnel, underwater, vacation, yucatan,