Most dangerous islands in the world

 The worlds most dangerous islands  where you definitely don't want to be washed ashore

Number 1:Ilha da Queimada, Brazil

Ilha da Queimada, nicknamed Snake Island, lies off the coast 

of Brazil and is home to thousands of Golden Lancehead Vipers – and little else. The snakes are among the world's most venomous, and there is, according to local legend, around five of the slithering critters to every square metre. For years, the only human inhabitant was a lighthouse keeper but now the Brazilian Navy has banned all civilians from the island.  Located 150 kilometers off the coast of São Paulo in Brazil is the uninhabited island of Ilha da Queimada Grande, or as it's more commonly known, 'Snake Island'. The snakes became trapped on the island when rising sea levels covered up the land that connected it to the mainland. The ensuing selection pressure allowed the snakes to adapt to their new environment, increasing rapidly in population and rendering the island dangerous to public visitation. One poisonous bite from the Golden Lancehead pit viper is enough to kill a grown man within a few hours. It's fast-acting venom will burn through flesh and cause its victim to bleed to death.

 Number2:Miyake-Jima, Japan

Found in the Izu islands of Japan, Miyake-jima's most prominent feature is the active volcano, Mount Oyama, which has erupted several times in recent history.  Over 3,600 people evacuated the island in 2000 because of the toxic gases which could harm their lungs. On July 14, 2000, Mount Oyama began another series of eruptions, and by September, the island was completely evacuated. After a four-year period of volcanic emissions, residents were allowed to return permanently on February 1, 2005. After the eruption, there has been a constant flow of sulfur dioxide gas coming from Mount Oyama. Residents of the island were once required to carry gas masks with them at all times. However, masks have not been needed for years. Alarms go off if there is a dramatic increase in the levels of toxic gases in the air. Volcanic gas emissions from this volcano are measured by a Multi-Component Gas Analyzer System, which detects pre-eruptive degassing of rising magmas, improving prediction of volcanic. Since the most recent explosion, in 2005, the volcano has constantly leaked poisonous gas, requiring residents to carry a gas mask at all times. Sirens go off across the island when the levels of Sulphur rise sharply. Miyake-jima, an island located in the southeast of Honshu, Japan is home to around 2,884 inhabitants .The island has continuous leakage of harmful poisonous gas from the high level of volcanic activities.

Number 3 :Saba, Netherlands Antilles

According the website of the Caribbean Hurricane Network, the tiny island of Saba has been hit by more severe hurricanes in the last 150 years than any other in the region, including by 15 category three storms and seven category fives. Head there during the winter.
Saba is known as the "Unspoiled Queen" of the Caribbean. Saba is especially known for its ecotourism, having exceptional scuba diving, climbing and hiking. The Juancho E. Yrausquin Airport offers flights to and from the nearby islands of St. The Caribbean island in the Lesser Antilles chain is a special municipality of the Netherlands. If you ever want to visit, make sure it’s during the winter. It has been hit by more major storms since 1851 than any other place on Earth. A total of 64 severe hurricanes passed through the island until 2010, according to the Caribbean Hurricane Network. This is one every two and half years.

Number4: Bikini Atoll, Marshall Islands

This Unesco World Heritage Site is dangerous for two reasons: nuclear radiation and sharks. It was the site of more than 20 nuclear weapons tests between 1946 and 1958, and – although the islands were declared 'safe' in 1997 – their original inhabitants have refused to return. Lying north of the Equator, Bikini is 225 miles (360 km) northwest of Kwajalein and 190 miles (305 km) east of Enewetak Atoll. It consists of a ring of about 20 small coral islands whose average elevation is only some 7 feet (2.1 metres) above low tide level. The area of the group amounts to little more than 2 square miles (5 square km) of dry land, distributed about the edges of an oval lagoon 25 miles (40 km) long and 15 miles (24 km) wide. The largest islands are Bikini and Enyu (or Eneu). The atoll was known before World War II as Escholtz Atoll. A 1998 IAEA report found that Bikini is still not safe for habitation because of dangerous levels of radiation. Before World War II, the atoll was known by its German name, Eschscholtz Atoll.The atoll is known for the nuclear testing the United States conducted on it during the 1940s and 1950s, before which the indigenous population was removed.

Number 5:Gruinard Island, Scotland

This small island in the north of Scotland was used by the British government for biological warfare testing during the Second World War. Experiments were carried out on the uninhabited island using the highly virulent anthrax bacterium, which killed hundreds of sheep and forced the island to be quarantined. The island was decontaminated in the 1980s, using hundreds of tones of formaldehyde – another potentially hazardous material. The island was dangerous for all mammals after experiments with the anthrax bacterium in 1942, until it was decontaminated in the late 20th century. 

Gruinard Island, off the coast of Scotland, was contaminated in 1942 by a test use of anthrax spores by the United Kingdom and the United States; the island remained uninhabitable for decades. The United States developed anthrax spores, botulinum toxin, and other agents as biological weapons but did not use them.

Number 6:Farallon Islands, US

Between 1946 and 1970, the sea around the Farallon Islands off the coast of San Francisco was used as a dumping site for radioactive waste. An estimated 47,500 55-gallon (208-litre) steel drums were discarded here but their exact location and the risk they pose to the environment is unclear. It is also believed that attempting to remove them would cause more damage than leaving them untouched. There is also an extensive elephant seal population, which attracts scores of Great White Sharks. Think twice before snorkeling. 

The waters surrounding the islands are notoriously dangerous and in April 2012 a 38-foot yacht called the Low Speed Chase was driven on the rocks and capsized in the annual Full Crew Farallon's Race. Eight people were onboard and three survived. "Even a Navy SEAL would feel panic in that situation," Kimball Livingston, editor at large of Sail magazine, told the San Francisco Chronicle after the accident. "I'm surprised anyone survived."

Native Americans called the Farallon Islands the "Islands of the Dead" and mariners referred to them as "the devil's teeth" for their ragged profile and treacherous shores. But the name that stuck was the Spanish Farallon, meaning a rocky promontory jutting from the ocean. The first mention of the name is in the diary of Friar Antonio de la Ascension who passed the area in a ship with the 1603 expedition of Spanish explorer Sebastián Vizcaino. A handful of researchers and scientists with Point Blue Conservation live in one of those homes on Southeast Farallon and they have been monitoring wildlife population trends for 50 years. "With our long-term datasets, we are capable of providing the refuge with accurate trend estimates that helps the refuge manage the wildlife," says Jim Tietz, a program biologist with Point Blue who spends much of his year on the islands. "This is one of the longest running collaborations between a government agency and a non-profit organization." The remaining islands are uninhabited.

Number 7:Ramree Island, Myanmar

This island, off the coast of Myanmar (Burma), is famous for a gruesome incident that occurred during the Second World War. In 1945, following fighting between British and Japanese troops, an estimated 400 Japanese soldiers were forced to flee into the marshes that surround the island, where they were apparently set upon by the island's sizeable population of saltwater crocodiles. The incident is, according to the Guinness Book of Records, The Greatest Disaster Suffered [by humans] from Animals.  
The Ramree Island crocodile attacks would have been the worst recorded in history. The British Burma Star Association seems to lend credence to the swamp attack stories but appears to draw a distinction between the twenty Japanese survivors of one attack and the 900 Japanese who were left to fend for themselves in the swamp. In his memoir, An Odyssey in War and Peace, Lieutenant-General Jack Jacob (Indian Army) recounted his experiences during the battle,
Over a 1000 soldiers of the Japanese garrison retreated into the crocodile-infested mangrove swamps. We went in with boats and interpreters using loudhailers asking them to come out. Not a single one did. Salt-water crocodiles, some of them well over 20 ft. in length frequented these waters. It is not difficult to imagine what happened to the Japanese who took refuge in the mangroves. The island  holds the world-record for largest human massacre caused by animals.

 Number8: Danger Island

The Danger Islands is a group of small islands lying 24 km  east-south-east of Joinville Island near the tip of the Antarctic Peninsula.
.Found 800 kilometers south of the Maldives, The name is thought to derive from the lack of safe anchorage, which made trips to the island particularly risky for early explorers. Several years earlier, the professor's brother (also an archaeologist) disappeared in the same island chain while searching for the mythical lost city of Tobanya. They are joined on their quest by Morgan, a shipwrecked merchant mariner, and his sidekick Chongo, who speaks only in a series of monkey-like chatters and birdcalls. They are pursued by a group of bumbling, but heavily armed, modern-day pirates led by the murderous Captain Mu-Tan, and by three tribes of cannibal natives known as "the Headhunters", "the Skeleton Men" and "the Ash Men.  This Unesco World Heritage Site is dangerous for two reasons: nuclear radiation and sharks. It was the site of more than 20 nuclear weapons tests between 1946 and 1958, and – although the islands were declared 'safe' in 1997 – their original inhabitants have refused to return.

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