This dive site, Dul Hranicna, is a unique flooded iron ore mine located near the Polish-Czech border. Mining ceased in 1968, and the site has been open for diving and visitors since 2018. Divers can explore varied underwater routes through the mine's infrastructure, experiencing exceptional visibility. The site offers a fascinating glimpse into industrial history beneath the surface, with navigation often following old mining tunnels and chambers.
As a freshwater iron ore mine, traditional marine animals and plants are not present. Divers may encounter specialized freshwater invertebrates or unique geological formations and mineral deposits within the submerged mine shafts and tunnels, offering interest for macro photography.
The site is notable for its perfect visibility and diverse underwater landscapes, making it an appealing destination for experienced divers seeking unique exploration. While tank filling is not available on site, the quality of diving compensates for this inconvenience. It is highly suitable for freedivers due to its depth. Divers should be prepared for cold water typical of inland quarries and mines and ensure they are appropriately certified for overhead and deep environments.
