Welcome to a whirlwind tour of the 10 strange mysterious islands that have baffled explorers, scientists, and storytellers for centuries. From vanished landforms on ancient charts to isolated outposts of covert experiments, these ten locations hold secrets that still echo across the seas.
10. Isla Bermeja, The Lost Island
Cartographers dating back to the 1700s consistently placed Isla Bermeja off the Yucatán Peninsula, farther out than any other Mexican claim. The island seemed perfectly positioned to bolster Mexico’s offshore oil claims and to counteract United States’ encroachments in the Gulf. Yet a 2009 investigation by the National Autonomous University of Mexico revealed that the island simply does not exist where the maps say it should.
According to the study, exhaustive sonar sweeps and aerial reconnaissance failed to locate any landmass at the indicated coordinates. The island was supposed to sit 55 nautical miles beyond Mexico’s 200‑nautical‑mile limit, effectively extending the nation’s exclusive economic zone. Though the search came up empty, Elias Cárdenas, head of Mexico’s congressional Maritime Committee, vowed to keep the hunt alive, speculating that the island might have sunk or become submerged elsewhere.
Conspiracy circles in Mexico have spun wild theories: some claim a U.S. bombing, others blame global warming or a massive earthquake. Cárdenas dismisses the bombing idea, noting that any such strike would have been unmistakably evident. The island’s disappearance was first reported in 1997 when a naval fishing expedition could not find it. Before vanishing, Isla Bermeja—estimated at 80 km² (31 mi²)—served as the reference point for Mexico’s 200‑nautical‑mile limit. Today, the Alacranes Islands define the end of the country’s maritime claims, shrinking its economic zone dramatically.