A 7,000-year deep freeze
The Hallstatt salt mines are the oldest in the world, with evidence of human activity stretching back 7,000 years. The constant low temperature of 8° Celsius and the high salt concentration create an environment devoid of microbial decay. This unique climate perfectly preserves organic materials that would otherwise disintegrate. For millennia, the mountain has been a time capsule, storing a direct record of prehistoric life.
Archaeological work has uncovered a collection of artifacts. In 1734, miners found the body of a prehistoric man, preserved by the salt since an ancient mining accident. Though he was reburied, records show his skin, hair, and clothing were intact. More recent finds include leather shoes, fur, ropes, and woolen textiles left by miners thousands of years ago. One of the most significant discoveries is a wooden staircase built around 1344 BCE. Dendrochronological analysis confirmed its age, making it the oldest known wooden staircase in Europe. It was returned to the mine after study, where the salt continues to preserve it. These objects show the details of the advanced and organized mining operations during the Bronze and Iron Ages. The period from 800 to 400 BCE is even named the "Hallstatt Age" because of the cultural evidence unearthed here.