The “Cave of Death” kills everything inside it: the video that will shock you

In the heart of the Recreo Verde tourist complex, located in Venecia de San Carlos in Costa Rica, there is a cave as fascinating as it is dangerous, known as the “Death Cave”. This small cave, located near the Poas volcano, is just 3 meters long and 2 meters deep, but its lethality has attracted the attention of scientists and visitors from all over the world.

The peculiarity of the Cave of Death lies in its very high concentration of carbon dioxidean odorless and colorless gas that makes the air inside it completely unbreathable. The carbon dioxide present in the cave is probably the result of geothermal processes.

The gas is believed to be released from mineral deposits subjected to high pressures and temperatures deep within the Earth’s magma. The location of the cave, close to an active volcano, could contribute to this phenomenon.

It produces approximately 30 kg of carbon dioxide every hour

Under normal conditions carbon dioxide is harmless, but in such high concentrations, as those recorded in the cave, quickly becomes deadly. Studies have shown that Death Cave produces approx 30 kilograms of carbon dioxide every hourcreating an oxygen-free environment that almost instantly kills any creature that enters it.

The danger of the cave was discovered by chance during the construction works of the tourist complex. A worker, having got too close to the entrance, has started feeling sickwhich led to an extensive investigation.

Today the cave is well signposted with warning signs which discourage anyone from entering. Its small size and narrow entrance still make it difficult for humans to access, but represent a deadly trap for small animals and insects.

To demonstrate the danger of the place, local guides often they place a lit torch inside the cave: the flame goes out immediately, highlighting the absence of oxygen. This phenomenon, combined with the purity of the gas that concentrates at the bottom of the cave, makes it a lethal environment. Despite this, the Cave of Death is considered a unique attraction, although inaccessible, for those visiting the Recreo Verde complex.