Asia;cave;cavern;caverns;caves;colored-lighting;coloured-lighting;geological-feature;Ha-Long-Bay;Halong-Bay;Hang-Sung-Sot-Cave;light;lighting;limestone-cave;limestone-formations;North-Vietnam;Northern-Vietnam;people;person;Qung-Ninh-Province;Quang-Ninh-Province;South-East-Asia;Southeast-Asia;stalactite;stalactites;stalagmite;stalagmites;Sung-Sot-Cave;Surprise-Cave;tourism;tourist;tourists;UN-world-heritage-area;UN-world-heritage-site;under_ground;underground;UNESCO-World-Heritage-area;UNESCO-World-Heritage-Site;united-nations-world-heritage-area;united-nations-world-heritage-site;Vnh-H-Long;Vietnam;Vietnamese;world-heritage;world-heritage-area;world-heritage-areas;World-Heritage-Park;World-Heritage-site;World-Heritage-Sites
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