Philips ConnorIslands are one of the most fascinating wonders of the world that many of us still have questions about till today. Think about it: how can a place exist in the middle of the ocean? I mean, a beautiful place that exists in nature with no human intervention.
Growing up, my dad would take us on adventures where we saw nature through the eyes of an adventurer. He was a nature photographer, so going places has never been a problem, just an extra expense on his end.
It was when I started growing that I started knowing that not all places in nature are friendly; some places will kill you on your first breath, and that is a fact I have come to live.
In this post, we will be talking about more islands in nature you should never visit no matter what, and if you do, you may end up dead in no time.
10. Bouvet Island
Norway claims this chunk of ice in the South Atlantic, but claiming and controlling are different things. Bouvet sits more than 1,000 miles from anything else, locked under glaciers that cover nearly the entire surface. The weather is Antarctic—wind, cold, and more cold. Landing here means fighting cliffs, pack ice, and seas that treat small boats like toys.
The real danger is not what is on the island. It is what happens when something goes wrong and nobody can reach you. A twisted ankle becomes life-threatening. Equipment failure turns fatal. In 1964, a British team found an abandoned lifeboat sitting on one of the few ice-free spots. Turns out, Soviet scientists had ditched it in 1958 when they barely escaped by helicopter as the weather turned. Even prepared expeditions with resources struggle here.
Bouvet does not attack. It just waits for you to make a mistake, then makes sure that mistake is your last.
9. Whakaari (White Island)
Off New Zealand’s coast, Whakaari breaches the surface like a warning. This is not a dormant volcano. It has been New Zealand’s most active for forty years, venting toxic gases and occasionally exploding without much notice.
People tried mining sulfur here in the early 1900s. In 1914, a landslide swallowed ten miners. The operation shut down. But the volcano kept going. On December 9, 2019, tourists were walking the crater when superheated water beneath the surface flashed into steam and exploded outward. Twenty-two people died. Others suffered burns so severe they spent months in treatment.
Scientists monitor Whakaari constantly, measuring gas, watching for ground shifts. None of that mattered in 2019. The eruption happened too fast for warnings to save anyone. Fumaroles in the crater hit temperatures above 700 degrees Celsius. Sulfur dioxide pours out continuously. The island sits there, breathing heat and poison, daring anyone to think they can predict it.
8. Fort Alexander
This artificial island fort sits in the Gulf of Finland, looking like something from a gothic novel. Built in the mid-1800s as a naval installation, it was converted in 1897 into a research lab focused on epidemics. The nickname “Plague Fort” stuck for obvious reasons.
The Imperial Institute of Experimental Medicine worked on serums for tetanus and cholera, but their plague research killed people. Between 1904 and 1907, three staff members contracted the disease. Two died, including the director. Bodies were cremated in the fort’s own furnaces to prevent the infection from spreading. That detail—burning corpses on-site—tells you how desperate containment efforts became.
The fort closed in 1917. Now the masonry is crumbling, and heavy sections of ceiling and wall threaten to collapse. But the bigger question hangs in the stale air: what else is in there? Forgotten samples, residual contamination in the walls, equipment that nobody properly decontaminated before walking away? Probably nothing viable after a century. Probably.
7. North Brother Island
You can see Manhattan from North Brother Island. The skyline glitters across the East River while this forty-acre plot rots in silence. From 1881 to 1943, Riverside Hospital quarantined people with contagious diseases here. Mary Mallon—Typhoid Mary—lived and died on this island, a healthy carrier locked away for public safety.
After the hospital closed, the city tried using the buildings for veterans’ housing, then a rehab center. Nothing stuck. By 1964, everyone left for good.
Now twenty-five buildings are disintegrating. Floors sag and collapse without warning. Concrete facades peel away. Roofs have caved in. But what makes the island nearly impossible to navigate is the vegetation. Nature has gone wild here, creating a sanctuary for Black-Crowned Night Herons and other wading birds. The undergrowth hides unstable ground, sharp debris, open pits. Walk through that tangle and you might punch through a floor before realizing there was a floor.
The city keeps it closed to protect both people from injury and birds from disturbance. Sometimes abandonment creates something worth preserving, even if getting there could kill you.
6. Vozrozhdeniya Island
The Soviets picked an island in the middle of the Aral Sea for their biological weapons testing, figuring isolation would contain whatever horrors they unleashed. From the 1930s through 1992, they tested weaponized anthrax, plague, smallpox, and tularemia. Some strains were genetically modified to resist antibiotics, turning treatable diseases into death sentences.
Then the Aral Sea started shrinking. Soviet irrigation projects drained the water faster than rain could replace it. By the early 2000s, Vozrozhdeniya was not an island anymore—it had become a peninsula. The natural containment barrier disappeared.
Contaminated dust from anthrax burial pits could now blow into populated areas. In 2001, the United States funded a decontamination effort that cost millions and focused on destroying anthrax spores still viable in the soil. That intervention happened because the danger was real and immediate, not theoretical.
When your bioweapons dump connects to the mainland and the wind starts kicking up spores, isolation stops being a defense. It becomes a timer.
5. Hashima Island (Gunkanjima)
Hashima looks like a battleship from a distance, hence the nickname Gunkanjima. Up close, it is a monument to how fast industrial civilization can collapse. Mitsubishi ran an undersea coal mine here, packing over 5,000 people onto a tiny island by 1959. When Japan switched to petroleum, the mine closed in 1974. Within three months, the island was empty.
The concrete high-rises were built to withstand typhoons and salty sea air. They are failing anyway. Walls buckle, floors drop away, and entering any building means gambling that it will not come down on you.
But the structural danger is just what you can see. The invisible threat is asbestos, which was used throughout the construction. As buildings decay, they release fibers into the air. Breathe that in and you are looking at cancer risk that does not show up for decades. Air samples near collapsed sections confirmed asbestos presence.
Hashima also carries moral weight. During World War II, forced laborers from Korea and China worked the mines under brutal conditions. Many died. The island is a grave as much as a ruin.
4. Poveglia Island
Poveglia sits in the Venetian Lagoon, small and cursed by its own history. During Black Death outbreaks, Venice used it as a dumping ground for plague victims. Bodies were burned or buried in mass graves. Estimates say 160,000 people ended up here over the centuries.
The folklore that half the soil is human ash isn’t entirely folklore—archaeological evidence backs it up. The ground is unstable, layered with remains. Disturb it and you’ll encounter bones, ash, and potentially residual biohazards from hastily dug plague pits.
In 1922, it became a mental asylum. Legends claim a doctor performed crude lobotomies and experiments before throwing himself from the bell tower. The asylum closed in 1968, and the buildings have been rotting ever since.
Poveglia combines crumbling infrastructure, contaminated soil, and a history dark enough to make trespassing feel deeply wrong. It doesn’t need ghosts to be haunted. The ground itself is enough.
3. Gruinard Island
During World War II, Britain tested weaponized anthrax on Gruinard Island off the Scottish coast. They used the Vollum 14578 strain, detonating bombs above sheep to measure how deadly and spreadable it was. The tests proved anthrax could make an area uninhabitable for decades.
The island was quarantined for nearly fifty years. Anthrax spores are insanely resilient—they survive in soil through everything. Decontamination finally started in 1986 with 280 tonnes of formaldehyde sprayed everywhere. After monitoring healthy sheep placed on the island, officials declared it safe in 1990.
Then in March 2022, a wildfire burned across Gruinard from end to end. Officials downplayed it, but fire changes things. If the heat or disturbed soil degraded the formaldehyde layer, deeply buried spores could’ve become airborne again. Nobody knows for sure. The fire didn’t prove contamination, but it raised enough doubt to keep Gruinard on the list of dangerous places.
Anthrax doesn’t care about declarations of safety. It waits.
2. Bikini Atoll
Between 1946 and 1958, the United States detonated twenty-three nuclear devices at Bikini Atoll in the Marshall Islands. The indigenous Iroij people were removed. The 1954 Castle Bravo test—a hydrogen bomb 1,000 times more powerful than Hiroshima—spread radiation across the region.
The air and water are clean now. The problem is the soil. Cesium-137, with a half-life of about thirty years, has woven itself into the ecosystem. Plants absorb it from the ground. People eat the plants. Studies show that internal radiation exposure from food contributes 85 to 90 percent of total radiation risk for anyone living on the northern atolls.
Tests on coconuts and pandanus fruits—staples in Marshallese diet—found contamination levels exceeding European Union and Japanese safety standards. On Bikini Island specifically, only three out of forty-seven coconut samples tested below Japan’s acceptable limit. Thirteen pandanus fruits exceeded the EU threshold of 600 becquerels per kilogram.
Cesium-137 in Bikini Atoll Foods
| Food Item | Island | Safety Finding |
|---|---|---|
| Mixed Fruits | Bikini Island | Above Japanese and EU standards |
| Pandanus Fruits | Bikini Island | 13 samples exceeded 600 Bq/kg EU limit |
| Coconuts | Bikini Island | Only 3 of 47 samples met Japan’s standard |
The contamination is not going anywhere soon. Remediation efforts like applying potassium fertilizer can help, but resettlement remains impossible without sustained intervention. The land looks fine. It will just kill you slowly if you try to live off it.
1. Ilha da Queimada Grande
Snake Island sits thirty miles off São Paulo, Brazil. It’s home to the Golden Lancehead pit viper—and pretty much nothing else that matters. When sea levels rose after the last Ice Age, these snakes got cut off from the mainland. They adapted by hunting migratory birds in trees instead of ground prey, which made their venom evolve to be three to five times more toxic than their mainland cousins. A bird hit by this venom drops before it can fly away.
The island is 106 acres with roughly one snake per square meter in the forested parts. You can’t walk there without running into multiple vipers. Each bite delivers fast-acting venom that destroys tissue rapidly, and there’s no readily available antivenom because the species only exists here.
The Brazilian Navy has banned all public access—both to protect people from a horrible death and to protect the critically endangered snakes from poachers. Some dangers are biological experiments worth studying from a distance. Snake Island is just a death trap you avoid.
Conclusion
These islands tell different versions of the same story: isolation amplifies danger. Some threats come from geology—volcanoes that erupt without warning, climates that freeze you solid. But the worst dangers are the ones we made ourselves. Weaponized anthrax that survives in soil for fifty years. Radiation that contaminates the food chain across generations. Industrial toxins released as buildings crumble.
The restrictions keeping people away from these places are not bureaucratic overreach. They are acknowledgments of failure—our failure to contain what we created, and nature’s refusal to clean up after us. These islands are museums of consequence, teaching lessons that would be better learned without anyone setting foot on their shores. If you want to explore them, documentaries and research papers offer a safer route than boats and trespassing charges.