According to Greek mythology, the temple was said to contain the “breath of Hades”, the god of the underworld , causing death to any creature that came near. (Photo: News.com.au)In ancient Greece and Roman times, it was believed that anyone or any animal that approached the temple would die instantly. (Photo: News.com.au)The ancient Greek geographer Strabo once described the temple as a deadly zone, where dense smog caused animals to die instantly upon approaching. (Photo: News.com.au)However, recent scientific studies have solved this mystery, suggesting that high concentrations of CO2, seeping from the Earth’s crust, were the cause of the deaths around the temple. (Photo: Time)Professor Hardy Pfanz from the University of Duisburg-Essen, Germany, discovered that the temple is located on the Babadag fault line, where toxic gases can escape from the Earth’s crust, leading to this mysterious phenomenon. (Photo: Discover Magazine)Similarly, in Costa Rica, a seemingly harmless cave is actually filled with toxic carbon dioxide (CO2). Any creature that enters the cave is at risk of immediate death due to the lack of oxygen and high CO2 concentrations. (Photo: tropicalbats)The cave is located near the Poas volcano and may be affected by cracks in the Earth’s crust, leading to CO2 seeping out from underground. (Photo: A24)The effects of CO2 are not only immediately dangerous, but can also lead to CO2 poisoning, with symptoms such as headaches, dizziness, and difficulty breathing, and in severe cases can be fatal. (Photo: Tiempo) Readers are invited to watch more videos: Surprisingly, the image of the “Gateway to Hell” is expanding.