Гурьевские каменоломни, Stone quarry in Venev District, Tula Oblast, Russia
The Guryev quarries form three separate systems of underground passages in Tula Oblast. The passages contain limestone karst formations and maintain constant temperatures throughout the year.
Limestone extraction began in the 15th century and expanded to the left bank of the Osetr River during the 16th century. Mining operations continued until the early 1900s, shaping the region across multiple periods.
The quarries host annual speleological competitions that draw explorers from across the region throughout the year. Visitors form small groups to navigate the underground passages together, turning exploration into a shared activity.
You must register in a logbook when arriving and explore the network only with qualified guides. The passage system is complex and can be confusing, so professional guidance is essential for both safety and finding your way.
Tectonic shifts created vertical cracks reaching 15 meters in height within this system, making it one of the largest artificial cavities in the country. These fissures developed through natural geological processes long after mining operations ended.
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