Ha Long Bay (literally: Bay of Descending Dragons; Vietnamese: Vịnh Hạ Long) is the most well-known touristic destination in Viet Nam, which is for good reason. It is really a UNESCO World Heritage site in Quảng Ninh province. If you've focused your trip on the extraordinary cities and monuments of urban Vietnam, a visit to Ha Long Bay leaves no doubt that Vietnam even offers some of the most beautiful natural sceneries worldwide.
The bay features thousands of limestone karsts and isles in assorted sizes and shapes. The Ha Long bay, dotted by incorporating 2000 limestone islets rising from emerald waters, is the best known natural wonder of Viet Nam. The islands were formed from limestone sediments deposited in the bottom of an ancient ocean. As the seas rose and fell over millennia, the soft limestone was easily shaped into the towering monoliths (geologists give them a call karst formations) as we see today. The forces of erosion also riddled the islands with caves, over 20 of which are available to tourists. Because of their precipitous nature, most of the islands are uninhabited and unaffected by a human presence. The outstanding scenic beauty is complemented by its great biological interest. The islands feature endless amounts of beaches, grottoes, and caves. The bay is often a sea islands in tropical wet with 2 seasons: hot and moist summer, dry and cold winter. Average temperature is from 15°C- 25°C. Annual rainfall is just about 2000mm.
In the shallow waters from the bay, there are a lot more than 200 species of fish and 450 different varieties of molluscs. Often the shape of the island determines its name, such as Voi Islet (elephant), Ga Choi Islet (fighting cock), and Mai Nha Islet (roof). Birds and animals, including antelopes, monkeys, and iguanas, also survive some of hawaii. Cat Ba Island is often a UN Biosphere Reserve and home to many rare species.
Archaeological evidence reveals that humans have settled near Ha Long Bay since a minimum of 3,000 B.C. The bay is not any stranger to conflict. In 1288 General Tran Hung Dao stopped Mongol ships from sailing in the nearby Bach Dang River by placing steel-tipped wooden stakes at high tide, sinking the Mongol fleet. Today General Tran Hung Dao (Hung Dao Vuong) is revered throughout Vietnam. You can visit the Dau Go (Cave of the Wooden Sticks), where legend says the wooden sticks that sank the Mongol fleet was stored.
Ha Long Bay is a major tourist destination, such as the be discouraged through the crowds. The area is large enough to have place for everyone, should your travel is well-planned. Peak season is May to October, when visibility reaches its best, although it's also the hottest time of the year.
The bay is approximately four hours drive from Hanoi. Instead of taking slow and often unsafe local buses, rent a car, take a special tourist bus, or book a tour with pick-up from Ha Noi. Most visitors do an overnight stick to a floating junk inside bay or inside town of Cat Ba on Cat Ba Island, but day trips are also possible. The easiest – plus recommendable - strategy to visit Ha Long is to require a tour from Ha Noi, which includes pick-up from Ha Noi, cruising Ha Long and stay overnight around the boat, with full-board service and transfer back, to the city or to the airport.
The itinerary of your so called two-days, one-night tour looks as follows:

Day 1: Ha Noi – Ha Long
8:00 pick-up in Ha Noi, drive to Ha Long, 12:30 embark the cruise boat, 13:00 start cruising and achieving lunch, visit caves, visit fisherman floating village, go kayaking, frolic in the water, 19:00 dinner, 21:00 octopus fishing or relax, stay overnight about the cruise ship or junk.

Day 2: Ha Long – Ha Noi
Next day, 06:00 start the day with many early sport, 07:00 breakfast, cruising time for pier, 12:30 returning to pier and disembark, lunch, 14:00 driving time for Ha Noi city or airport. The cost of different luxury levels in the cruise ship is 40 USD to 180 USD. The service and accommodations on boat tours ranges from bare bones (Huong Hai) to luxury (Emeraude, Emotion), but paying more will give you a better experience.
A great way to explore and find out the bay is actually kayak. You can choose where you want to go, along with the bay's waters are smooth and suited to beginners. Ask locally for places to rent kayaks, should your tour doesn't include kayaking.
Caves in Ha Long Bay
You could have a wonderful holiday to Ha Long Bay although you may never step foot off a cruise boat, however, you won't want to miss the extraordinary caves within the hawaiian islands. In a lot of the caves are stalactites .and stalagmites, which resemble subterranean icicles. Stalactites form from the top down and stalagmites form through the bottom up Here are some in the better known caves:

Sung Sot Cave (Surprise Cave):
One in the largest and most impressive in the caves, the Surprise Cave was presented with its name through the astonished French explorers who discovered it in 1901. Fifty steps lead up to the cave entrance. From there you'll undergo three progressively larger grottoes, each festooned with stalactites and stalagmites that take on different shapes, such as a dragon, tiger and penguin. Once you emerge through the caves you will be rewarded having a spectacular view over the bay below.

Dau Go Cave (Cave in the Stakes): According to legend, the wooden stakes that General Tran Hung Dao used to stop the Mongol fleet were stored here. The cave is made up of three chambers. The first includes a massive pillar that appears to be a monk holding a cane. A second, narrow chamber leads to a huge third grotto, with spectacular animal-shaped rock formations. For good reason early French explorers named it "Grotte des merveilles"-the cave of marvels.

Trinh Nu Cave (Virgin Cave): A story is told that in lieu of marry an old king, a beautiful local girl fled to the cave and committed suicide by turning herself into a rock formation inside cave. Virgin Cave tunnels with the island above for over a mile, with numerous beautiful chambers on either sides.Your tour boat will probably stop near Virgin Cave for your night.

Thien Cung Grotto (Heaven Palace Grotto): Climbing steep stairs through thick forest, visitors for the Thien Cung Grotto enter an enormous chamber adorned with stalactites and stalagmites of all kinds. This can be a popular cave for day trippers on their strategy to Cat Ba Island.
Other caves you may wish to visit include: Trong Cave (Drum Cave), Tam Cung Cave (Three Palace Grotto), Bo Nong Cave (Pelican Cave).
Other places of interest

Floating fishing villages
A community close to 1,600 people thrives on Ha Long Bay in numerous floating fishing villages. You can see them from boat tours or all on your own by kayak. The residents with the floating fishing communities are intimately connected to the sea in their lives

Cat Ba Island
Cat Ba is, at 87 square miles, the most important island in the bay and also the main overnight hotel stop on inexpensive package tours.Approximately half with the island's area is covered with a national park-also a UN Biosphere Reserve, which is home to the highly endangered Cat Ba langur. This golden-headed langur is never seen, as under 100 specimens are thought to survive in the wild, even though it is the subject of your well-organized conservation program. Other mammals in the park include civet cats and oriental giant squirrels. The park faces the constant challenge of protecting its biodiversity while encouraging tourism. Although there is much beauty to explore for the island, Cat Ba town itself (pop. 8,000) has less to offer visitors. Many of the tours of Ha Long Bay include Cat Ba, so getting for the island is straightforward.
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