Con Dao is an archipelago off the coast of South Vietnam and is also a district-level administrative unit of Ba Ria - Vung Tau province, Vietnam. The archipelago is 97 nautical miles from Vung Tau city. The closest place to Con Dao on the mainland is Vinh Hai commune, Vinh Chau town, Soc Trang province, 40 nautical miles away. Con Dao was once known as the largest prison and exile place in Indochina before 1975. Today, Con Dao is also known as a resort and sightseeing spot with beaches and nature reserves. Con Dao National Park.Con Dao or Con Son are also used for the name of the largest island in the archipelago. Vietnamese history books before the twentieth century often called the island of Con Son Con Con island. According to the researchers, the name Kunlun is derived from the Malay language, "Pulau Kundur" (roughly translated as "Hon island"). Europeans transliterated into Poulo Condor (in English and French texts). Particularly the Khmer name is "Koh Tralach".  In 1977, the Vietnamese National Assembly decided its official name was Con Dao. This name is used to this day.Based on archaeological results, researchers believe that Con Dao had the presence of humans from prehistoric times through artifacts artifacts, which were determined in the middle of the early period. Metal and closely related to pre-Sa Huynh ceramic relics early in South Central and Southeast. Located far from the mainland, but due to its convenient location on the maritime route connecting Eurasia, Con Dao soon became known to the West. The original records of a ninth-century Arab merchant merchant, Soleyman (or Sulaymân), were quoted by French documents, recording an archipelago called Sender-Foulat (or Cundur). -fũlát) is located in the South China Sea.  According to the French scholar Gabriel Ferrand: Cundur-fũl is an ancient reading, Sundur-fũl is a modern reading; means iles de la courge in Malay. He also asserted that it was Poulo Condore Island, located at a site forty miles south of the Mekong Delta; corresponding location of Con Dao archipelago today. In his travel book Marco Polo, Italian businessman Marco Polo records in 1294 that his 14-boat merchant fleet on the way from China to the country was engulfed by a typhoon that lost 8; the remainder were displaced in Con Dao , which he noted as Poulo Condore.XV-XVI century: there are many European delegations visiting Con Dao. Late 17th and early 18th centuries: British and French capitalists began to pay attention to Eastern countries. Many times British and French companies sent people to Con Dao to investigate and investigate the situation in all aspects with the intention of capturing Con Dao. In 1702, the 12th year of Lord Nguyen Phuc Chu's life, the director of the British East India Company personally led the troops to land at Con Dao, built a fortress and a flagpole. After 3 years, on 3 February 1705, a Macassar insurgency occurred (Sulawesi soldiers). The British army had to leave Con Dao. On November 28, 1783, during the trip to bring Prince Canh and Lord Nguyen Anh's royal seal to France, Pigneau de Béhaine (Ba Da Loc) stood by himself to represent Nguyen Anh to sign with Earl De Mantmarin (representing King Louis XVI of France) a treaty called the Treaty of Versailles. This is the first document ceding France the sovereignty of the Touron estuary [Note 1] and the Kunlun Islands. In return, the French would help Nguyen Anh with four warships, 1,200 soldiers, 200 gunners, and 250 African soldiers to fight against the Tay Son family. The French Revolution broke out, causing the country to not fulfill this commitment. Legend has it that in the 3rd phase, being pursued by Tay Son, Nguyen Anh and his followers escaped to Kunlun. He lived in seclusion for months here. Therefore, at present, there is a high mountain in Con Son island called Chua Mountain; In An Hai village, there is the second temple of Nguyen Anh, Hoang Phi Yen, and in Co Ong village, there is a temple to worship Prince Cai Cai of the Phi Hoang Phi Yen. In Gia Long's time, according to Dai Nam's unanimity, Con Dao belonged to Can Gio district, Phien An town, and Gia Dinh town (Gia Dinh citadel). By Minh Mang 20 (1839), Con Dao was moved to Vinh Long province of Cochinchinese province. In 1822, British ambassador John Crawfurd on his journey to Siam and Cochin China Vietnam visited and discovered Con Dao. As soon as they landed on the island, the people welcomed Crawfurd's group confidently and frankly, though perhaps they rarely met Europeans. A group of young people playing football on the beach hurriedly stopped having fun, taking Crawfurd's group to the village chief. This venerable village chief is about 45 years old, inviting a European delegation to visit. A number of people and officials came to visit the ship, carrying goods to trade with European goods. According to Crawfurd, the people here of Con Dao were poorer and more likable than the greedy and deceitful Siamese, regardless of the class he met in Siam. The good-ranking mandarin, head of the island, named Cham-Kwan-Luong .  Pulo Condore Islands consists of 12 islands of all sizes. The largest island in Con Son is 12 miles long and 4 miles wide. Pulo Condore's Malay name means "Melon Island"; Annamites do not know this name, they call it Koh-naong Kunon. The largest bay village has about 300 inhabitants. There are two other villages on the island, with a total population of about 800 people. All people here are Cochin China Vietnam, no Chinese or Cambodians here. The people of Pulo Condore mainly buy rice from Saigun Saigon in exchange for selling turtles and seafood...On February 1, 1862, Bonard signed a decision to set up Con Dao prison, thereby turning Kunlun into a place to hold Vietnamese political prisoners with a famous tiger cages system. Under the French colonial rule, there was a saying: "Kunlun is easy to come back Old to leave the body, boys go to hold bones. " Under Con Dao prison regime, about 20,000 Vietnamese of many generations died and were buried at Hang Duong Cemetery. The Con Dao archipelago is 97 nautical miles from Vung Tau city and 45 nautical miles from Hau estuary, has the same longitude as Ho Chi Minh City (106 ° 36 ′ East) and the same latitude as Ca Mau province ( 8 ° 36 ′ North). The archipelago consists of 16 islands, of which 14 are clustered close together; Particularly, Big Eggs and Small Eggs are separated to the west, which has been newly imported to Con Dao district by the Vietnamese government since 1995. Con Dao has a total land area of ​​76 km², of which the largest is Con Son island. The island has mountainous terrain, dominated by granite ranges running from the southwest to the northeast, protecting the island's bays on both sides from strong winds. [18] The highest point of the archipelago is the peak of the Holy Cross on Con Son Island, 577 m high. Archipelago geology is highly diverse, including Mesozoic intrusive igneous rocks, acidic igneous rocks and neutral eruptions and Quaternary sediments. 

Con Dao island is one of the most beautiful islands in Vietnam.Its beauty has attracted many tourists to this island.On going to Con Dao,you can visit Con Dao prison which is the most agressive prison in Viet Nam where prisoned all the revolutionary soldiers.When go to the beach,you can enjoy the beauty of a peaceful sight.We can also have the diverse food about crabs,shrimps.Con Dao is one of the most islands we can visit