Dau Go is probably the most famous of all grottoes in Ha Long. Dau Go is located on a limestone islet 8 km south of Bai Chay. The islet itself stands 187 m above sea level. Upon arriving visitors must hike the 90 rocky steps that lead to the cave's entrance. There are three chambers with the outer one having the most spectacular stalagmites and stalactites. Some are as tall as 20 m in height. The middle chamber is accessible through a narrow passage approximately 1.4 m wide. There is a round crystal like structure on the path. When struck by light, this structure emits a kaleidoscope of light that is both breathtaking and unique. The inner chamber is famous for the colorful stalagmites and stalactites. The inner chamber is much smaller by comparison. It is here that visitors will find stone wells filled with fresh water.

Located east of Hanoi, this park is famous for its magnificent scenery. Considered one of the most beautiful parks in Vietnam, Halong Bay National Park covers 1553 square kilometers of land area. The sight of more than 2000 islands covering the bay is quite a spectacle.
The name "Halong" literally means "the dragon descending to the sea". According to the legend, a family of dragons appeared from the sky to save the people from invading forces, and the islands were formed from the gemstones that the dragons spit out to fight the invaders.

About 30km east of Haiphong this diverse ecosystems including tropical evergreen forests, freshwater swamp forests, coastal mangroves, freshwater lakes and waterfalls, grottoes, caves, sandy beaches and offshore coral reefs. It's home to monkeys, boars, deer, squirrels and hedgehogs, and its offshore waters are also heavily populated by fish, molluscs, arthropods, seals and dolphins. It is hoped that plans to designate massive areas of land as national parks go ahead.