Located in the center of UNESCO-recognized Ha Long Bay, Sung Sot Cave, Vietnam was discovered by the French at the turn of the 20th century. One of this expansive cavern’s most impressive features is its high ceiling with stalactites in all sorts of shapes and sizes. Not only is Sung Sot a paradise for geology and caving enthusiasts, but the interior of this karst cave is lit with a rainbow of colored lights that splash against the formations, making for truly magical surroundings! According to Sung Sot Cave history and legend, one of the rock formations resembles a sword that once belonged to Thanh Giong, a folk hero. Using this weapon, Giong defeated an enemy army. Giong was transported to heaven after the victory, but he left the sword lodged in Sung Sot as a reassuring reminder for the local people.