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Miles from the ocean, there's diving beneath the streets of Budapest


The same thermal waters that feed Budapest’s famous baths and spas have also created a subterranean underwater labyrinth that divers are still discovering.

Every day, crowds flock to the Lukács Thermal Baths in Budapest, soaking in warm mineral-rich pools as yellow trams clatter along Frankel Leó Street. From its entrance, tucked into the base of Rózsadomb — Rose Hill — an affluent neighborhood of elegant villas and tree-lined streets, the Molnár János Cave stretches for over 3.6 miles (5.8 kilometers) and plunges nearly 300 feet (90 meters) below the surface. Over millennia, the same geothermal activity that feeds the city’s baths has carved a network of more than 200 caves beneath its streets — as mineral-rich springs slowly dissolved the surrounding limestone, marlstone and karst rock.

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