10 Scariest Islands in the World

#10: North Sentinel Island, India

The people of North Sentinel Island want one thing: to be left alone. Step onto the shore and you could be killed or arrested, as India protects the island with a strict 3-mile exclusion zone. Special contact attempts were made from the 1960s to 1990s, but the first genuinely peaceful encounter didn't come until 1991, and even then, nothing changed. In 2006, two fishermen who drifted into the waters illegally were killed. American missionary John Allen Chau was killed in 2018 after landing on the beach three separate times. Others who ventured there have simply gone missing. Sadly, this island’s population is estimated at just 50 to 200, and a single introduced illness could wipe them out entirely.

#9: Island of Dolls, Mexico City

If you’re scared of dolls, this is the last place you want to visit. Hidden in the canals of Xochimilco near Mexico City, the Island of the Dolls is covered in thousands of rotting dolls, many missing eyes, arms, or heads. According to legend, caretaker Don Julian Santana Barrera found a drowned girl in the canal and began hanging dolls to appease her restless spirit. Convinced they were protecting him, he collected more over the years. It appears they weren’t. In 2001, Don Julian was found face-down in the very same canal where the girl had died. Locals say the spirit finally claimed him. His great-nephew who tends the island today, says he still hears things he can’t explain.

#8: Bikini Atoll, Marshall Islands

This unfortunate island did not become toxic by choice. Bikini Atoll was once a quiet coral paradise in the Marshall Islands, home to about 167 people who fished, farmed coconuts, and lived off the lagoon. In 1946, the U.S. relocated them to make way for nuclear testing. They were first sent to Rongerik Atoll, where severe food and water shortages turned the relocation into a disaster, before being moved again. Between 1946 and 1958, 23 nuclear tests left the atoll dangerously contaminated. A return in the 1970s proved short-lived after radiation in locally grown food was found to be unsafe. Today, divers and occasional visitors come to explore the shipwrecks resting in its lagoon, but Bikini Atoll remains largely uninhabited.

#7: Vozrozhdeniya Island (Aral Sea)

There are islands that feel abandoned, and then there is Vozrozhdeniya in the Aral Sea. In the 1920s, Soviet military planners needed a remote place to test biological weapons, and this isolated island fit perfectly. It was far from cities, hard to reach, and easy to seal off. What had once been a quiet, unremarkable place was turned into a secret laboratory where deadly agents such as anthrax, plague, and smallpox were tested on open ground. When the Soviet program ended in 1992, the island was simply abandoned, along with contaminated buildings and buried biological agents. As the Aral Sea shrank, Vozrozhdeniya stopped being an island entirely. By 2001 it had merged with the mainland, and the contamination it once contained came with it.

#6: Alcatraz Island, United States

Alcatraz has always been a place of punishment. Long before it held gangsters, it held soldiers. Drawn by the brutal geography that would later define its reputation, the U.S. military used the island as a prison as far back as the Civil War. Freezing water, punishing currents, and the San Francisco skyline sitting just over a mile away meant freedom was always in sight, yet completely out of reach. When the federal penitentiary opened in 1934, it inherited that legacy, housing notorious criminals like Al Capone, Machine Gun Kelly, and the Birdman of Alcatraz. Of the 14 escape attempts, none were officially confirmed successful. The prison closed in 1963, but park rangers still report cold spots, disembodied screams, and even a mysterious red-eyed entity.

#5: Gruinard Island, Scotland

With wooded hills, grazing land, and a quiet dock for fishing boats, Gruinard Island was once an ordinary stretch of Scottish coastline. Then in 1942, the British military requisitioned the remote island and detonated anthrax bombs to test their effectiveness as biological weapons. The results were catastrophic. Deadly spores saturated the soil so completely that the island was immediately quarantined. For nearly fifty years, no one could safely step onto its soil because the contamination was still lethal to living creatures. Even test animals placed there later quickly died, confirming the lingering threat. It was finally decontaminated and declared safe in the 1990s. More trouble followed in 2022, when the island was engulfed by a major wildfire.

#4: Hashima Island (Battleship Island), Japan

Off the coast of Nagasaki lies Hashima Island, a place that once symbolized industrial ambition and human density. Nicknamed Battleship Island, it was once one of the most crowded places on Earth, packed with miners and their families. But the island's prosperity came at a cost. During World War II, Korean civilians and Chinese prisoners of war were forced to work its mines under brutal conditions. When Japan shifted from coal to petroleum, the mines became unviable and the island was abruptly abandoned in 1974. Today, crumbling apartment blocks still stand like empty shells, creating the eerie atmosphere featured in “Skyfall.” A reminder of war crimes, Japan is still fighting UNESCO over whether to acknowledge what happened there.

#3: Clipperton Island, France

Several nations once fought over this remote coral atoll about 700 miles off the Mexican coast, because of its valuable guano deposits and strategic Pacific position. Mexico established a small military colony there in 1905. When the Mexican Revolution cut off supply ships, the colonists were simply forgotten. Disease, starvation, and accidents slowly wiped out the population. Eventually, only a handful of women and children remained under the control of a self-appointed king - a lighthouse keeper named Victoriano Álvarez. He ruled through fear, violence, and abuse for years until the women finally fought back and killed him. By the time rescue arrived, almost everyone else was dead. Today, Clipperton Island belongs to France and remains uninhabited.

#2: Poveglia Island, Italy

In the Venetian lagoon sits Poveglia, an island locals have long refused to approach. From the late 1700s it served as a quarantine station, where ships arriving in Venice offloaded anyone showing signs of plague. The sick were isolated there, and most never left. Centuries of disease and death gave the island a grim reputation long before it became a psychiatric hospital in 1922. Rumors of cruel experiments and mistreatment of patients spread, though historians note many of the darkest stories were later invented by American television. The hospital closed in 1968 and the island was abandoned. In 2025, a Venetian civic group finally won the right to transform part of it into a public park, the first time in decades anyone has been back.

#1: Ilha da Queimada Grande (Snake Island), Brazil

If there’s an island that feels engineered by nature to keep humans out, it is Snake Island, off Brazil’s coast. Around 11,000 years ago, rising sea levels cut it off from the mainland, trapping a population of pit vipers with no predators and no escape. Over millennia, they evolved into the golden lancehead, a species found nowhere else on Earth. Their venom is estimated to be three to five times more potent than its closest mainland relative. Between 2,000 and 4,000 of them now live on just 106 acres. The Brazilian Navy banned civilian access in the 1920s, partly for human safety, and partly because of poachers. Researchers who do get access must bring a doctor on the boat.

Which Island scares you the most? Let us know in the comment section.