Karst Reflection at Halong Bay - a UNESCO World Heritage site - the bay features thousands of limestone karst isles in various sizes and shapes. Legend has it that long ago when the Vietnamese were fighting Chinese invaders the gods sent a family of dragons to help defend the land. These dragons began spitting out jewels and jade. These jewels turned into the islets dotting the bay linking together to form a great wall against the invaders. The people kept their land safe and formed what later became the country of Vietnam. After that, dragons were interested in peaceful sightseeing of the Earth and decided to live here.