Průrva Ploučnice, Underground canal in Noviny pod Ralskem, Czech Republic.
The Průrva Ploučnice redirects the entire river through a 150-meter rock tunnel, creating a remarkable engineering structure in the natural landscape.
Engineers constructed this water tunnel during earlier centuries to support the operations of a local hammer mill, demonstrating advanced water management capabilities.
The site represents a protected cultural monument that showcases the technical achievements of Czech engineering and water management systems.
Visitors can explore the canal area through designated pathways and observe the water flow from multiple viewing points along the carved stone tunnel.
The Ploučnice River disappears completely into the underground passage known as Devil's Throat, emerging again on the other side of the rock formation.
Location: Noviny pod Ralskem
GPS coordinates: 50.68761,14.76324
Latest update: December 8, 2025 17:39
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