The Darvaza gas crater, also known as the "Gates of Hell", is a burning natural gas field collapsed into a cavern near Darvaza, Turkmenistan.

Hundreds of natural gas fires illuminate the floor and rim of the crater. The crater has been burning since the 1980s and has distinct, burning sulfur smell which permeates the area. How the crater formed is unknown, but engineers ignited the crater to prevent poisonous gases from spreading.

The gas crater is near the village of Darvaza in the middle of the Karakum Desert. It has a diameter of 60–70 metres and a depth of about 30 metres.

The early years of the crater's history are still being determined. Relevant records are either absent from the archives, classified, or inaccessible. Some local geologists have claimed that the collapse of a crater happened in the 1960s; it was set on fire only in the 1980s to prevent the emission of poisonous gases. Others assert that the site was drilled by Soviet engineers in 1971 as an oil field but collapsed within days, forming the crater, with the engineers choosing to flare the crater to prevent the emission of poisonous gases but underestimating the volume of the gas.