The Door to Hell

In 1971, Soviet geologists accidentally opened a portal to an underground natural gas cavern in Turkmenistan's desert, and to prevent poisonous gas from spreading, they set it on fire expecting it to burn out in weeks—it's still burning today.

The Darvaza gas crater, known locally as the Door to Hell or Gates of Hell, is a surreal and terrifying sight in the middle of Turkmenistan's Karakum Desert, a circular pit approximately 70 meters in diameter and 30 meters deep that has been continuously burning with hundreds of individual flames since 1971, creating an inferno that illuminates the desert night with an orange glow visible for kilometers and that produces heat intense enough to feel from the crater's rim, and this bizarre phenomenon exists because of a combination of Soviet-era geological exploration, unexpected underground collapse, and a decision to set fire to escaping natural gas that was supposed to solve a temporary problem but instead created a permanent burning monument that has become one of the most photographed and visited sites in Turkmenistan despite or perhaps because of its apocalyptic appearance.

The story of how the crater formed has been told and retold with varying details, but the generally accepted account is that in 1971, Soviet geologists were conducting exploratory drilling for natural gas in the Karakum Desert when they struck a large underground cavern filled with natural gas, and the weight of the drilling equipment and the disturbance caused by the drilling triggered the collapse of the cavern roof, creating a large crater and releasing substantial quantities of methane and other gases into the atmosphere. Concerned about the environmental and health hazards of allowing toxic gas to escape uncontrolled, and believing that the underground gas reserves feeding the crater were limited and would be exhausted relatively quickly, the geologists made the decision to ignite the gas, expecting it to burn off in a matter of days or weeks, but the gas flow has continued unabated for over fifty years, indicating that the underground reserves are either far larger than initially estimated or that the crater tapped into a gas field that continues to be replenished through geological processes.

The exact size of the gas reserves feeding the Darvaza crater remains unknown, and various estimates have suggested anywhere from decades to centuries of remaining fuel at current burn rates, though without detailed subsurface geological surveys it is impossible to determine accurately how long the fire might continue, and the Turkmen government has periodically discussed plans to extinguish the fire and properly develop the gas field for commercial exploitation, but as of 2024 the crater continues burning and has become such a distinctive landmark and tourist attraction that there may be economic incentives to preserve it rather than extinguishing it despite the waste of valuable natural gas resources. Some geologists have suggested that attempts to extinguish the fire might be unsuccessful or could even be dangerous, as simply covering or sealing the crater could allow gas to accumulate and potentially cause larger explosions or could redirect the gas flow to emerge elsewhere in less controlled and predictable ways.

The environmental impact of the constantly burning crater includes the continuous release of carbon dioxide and other combustion products into the atmosphere, and while the quantities are relatively small compared to global emissions from human activities, the Darvaza crater represents a point source of greenhouse gas emissions that has persisted for over half a century, and there are legitimate questions about whether allowing this waste of natural resources and contribution to atmospheric carbon is justified by the crater's value as a geological curiosity and tourist destination. The site has also become a subject of scientific interest beyond the obvious spectacle of the burning crater, with researchers studying the microbial life that exists in the extreme heat environment around the crater rim, the geological characteristics of the subsurface gas reservoir, and the combustion dynamics of a natural gas fire of this scale and duration.

Visitors to the Door to Hell report that the experience of standing at the edge of this burning pit in the middle of empty desert is profoundly surreal and almost otherworldly, with the intense heat, the roar of burning gas, the sulfurous smell, and the sight of hundreds of individual flames dancing across the crater floor creating an impression of standing at the entrance to some literal underworld, and the contrast between the burning crater and the cold desert night sky filled with stars creates a juxtaposition of elemental forces that many visitors describe as both beautiful and terrifying. The crater has become increasingly accessible to tourists as Turkmenistan has developed its tourism infrastructure, and overnight camping trips to the site have become popular despite the remote location and harsh desert conditions, allowing visitors to experience the full visual impact of the burning crater against the darkness of the desert night.

The Door to Hell stands as an unintended consequence of industrial activity and human decision-making, a permanent alteration to the landscape created by a choice that seemed reasonable at the time but that has had lasting effects far beyond what was anticipated, and whether it continues burning for another fifty years or is eventually extinguished and developed as a conventional gas field, it represents a unique intersection of geology, human activity, and unintended consequences that has created one of the most unusual and visually striking sites on Earth, a man-made natural phenomenon that blurs the boundary between geological feature and industrial accident and that serves as both a tourist attraction and a cautionary tale about the unpredictable consequences of disturbing complex natural systems without fully understanding their extent and characteristics.