Budapest is known for its spas. Their water originates from the volcanic earth. One of the most well-known springs is Malom Lake. It is a doorway to a spectacular cave system called Molnár János. Only a part of it has been explored so far. Nobody knows how far or how deep below the city the tunnels reach.

Antti Apunen and Janne Suhonen take you on a unique journey into the depths of a cave that has formed over hundreds of thousands of years.  Janne’s photographs give a rare insight into the depths of a pre-historical volcano and tunnels carved by acidic waters.

Over five kilometers of the caves have been explored. The biggest explored hall is over 80 metres long and 16-26 metreswide. If an ordinary kitchen water tap was installed at the bottom of it, it would take four and a half years to empty it. There are countless halls like this in Molnár János.

Drilling in the surroundings of Molnár János has revealed that there is a network of many caves crisscrossing between 150 and 250 metres deep underground. The tunnels of Molnár János continue towards the depths, but so far divers have only reached the depth of 75 metres. The exploration of the cave system continues.

Antti and Janne will also present stunning images from the József-hegy dry cave, 60 meters underneath the city of Budapest.