What is the most frightening thing that's ever been discovered by archaeologists?

One of the most frightening discoveries made by archaeologists is the tomb of Qin Shi Huang, the first Emperor of China. His tomb, located near Xi'an, China, is famous for its terracotta army, which consists of thousands of life-sized clay soldiers, horses, and chariots buried with the emperor to protect him in the afterlife.

While the terracotta army itself is not inherently frightening, what lies within the tomb is speculated to be. The tomb itself remains largely unexcavated, as the Chinese government is waiting for technology to advance sufficiently to preserve the artifacts inside without damaging them. Legends and historical accounts suggest that the tomb may contain numerous booby traps, rivers of mercury, and other deadly mechanisms designed to protect the emperor's remains and treasures. These tales have sparked the imagination of many, leading to speculation about what horrors might be lurking within the tomb's depths.