下龍灣
Hạ Long Bay is host to two ecosystems: a tropical, moist, evergreen rainforest ecosystem; and a marine and coastal ecosystem. The bay is home to seven endemic species: "Livistona halongensis", "Impatiens halongensis", "Chirita halongensis", "Chirita hiepii", "Chirita modesta", "Paraboea halongensis" and "Alpinia calcicola". Bioluminescent plankton can also be found.