Science
Jun 17, 20261
69%
The Door to Hell: A Soviet Gas Crater Still Burning After 55 Years in Turkmenistan
A 1971 Soviet gas drilling accident in Turkmenistan's Karakum Desert created a continuously burning crater now known as the Door to Hell. What engineers expected to burn for weeks has persisted for over 55 years, fueled by an immense underground methane reservoir and drawing thousands of tourists annually.
Quick Facts
Who
Soviet geologists
What
drilling rig collapsed
When
autumn 1971
Where
Darvaza village
- drilling rig collapsed
- crater formation
- methane ignited
- continuous burning for 55+ years
- Soviet geologists
In autumn 1971, Soviet geologists drilling for natural gas near the village of Darvaza in Turkmenistan's Karakum Desert encountered an unexpected catastrophe when the ground collapsed beneath their drilling rig. The collapse revealed an underground cavern hollowed out by methane migration, venting gas at hazardous levels. Faced with a site that posed asphyxiation and explosion risks to nearby livestock and settlements, the geologists made a pragmatic decision: they ignited the escaping methane, a common petroleum industry practice intended as a temporary flare to burn off the gas within weeks.
More than five decades later, the crater remains ablaze. Now roughly 70 meters across and 20 meters deep, the site has become known as the "Door to Hell" or "Gates of Hell"—a dramatic nickname coined by visitors rather than locals. Every night, the crater throws orange light across the Karakum Desert, visible from kilometres away. The name "Darvaza" derives from a nearby settlement and a Persian-rooted word meaning "gate," though the more lurid moniker came later from travelers captivated by the fiery pit.
The persistence of the flames reveals a fundamental miscalculation by the original survey team. What the geologists believed was a contained gas pocket turned out to be part of a much larger connected reservoir. The Amu Darya Basin, which underlies the site, is geologically unstable, with methane continuously seeping upward through fractures in limestone bedrock. The fuel feeding the crater comprises overwhelmingly methane, along with smaller fractions of ethane, propane, butane, and trace hydrogen sulfide—the latter accounting for the rotten-egg odor visitors detect on still nights.
The Karakum Desert, covering roughly 70 percent of Turkmenistan and spanning an area the size of Germany, sits atop one of the largest natural gas systems on the planet. Long before Soviet drilling began, locals understood the instability of the region: herders learned to avoid low-lying depressions where methane pooled and the air "smelled wrong." The 1971 incident, in which the rig, trucks, and surrounding desert dropped into a void, resulted in no confirmed deaths, though records from that era remain sparse and the Turkmen government has never released an official report.
The continuous burning represents what cognitive psychologists call the planning fallacy—a near-universal tendency to assume immediate problems resolve faster than historical precedent suggests. The initial estimate underestimated the fire's duration by a factor of approximately 2,500. Today, the site has become an unlikely tourist attraction, drawing visitors to witness the dramatic manifestation of geological forces and Cold War-era decision-making in the heart of Central Asia's empty desert.
Why This Matters
The Door to Hell exemplifies how short-term engineering decisions can have unexpectedly long-term consequences, while illustrating the vastness of Earth's hydrocarbon reserves and the complexity of underground geology. For readers interested in environmental history, infrastructure failures, and Cold War-era decision-making, this story reveals how a 1970s miscalculation created a persistent natural landmark now shaping tourism and regional identity in Central Asia—a cautionary tale about underestimating geological processes and the importance of comprehensive site surveys before intervention.
Timeline & Sources
Jan 1, 1971
WireMethane crater ignited as temporary flare solution