Molnár János Cave (Dive Site)

The Molnár János Cave is a water-filled thermokarst system in Budapest's Rózsadomb district, just 200 meters from the Danube. Named after the pharmacist János Molnár, who explored its dry passages in the 19th century, the underwater world has been explored by divers since the 1950s. The system extends for more than six kilometers and reaches depths of up to 100 meters. You can visit the cave as a diving site, though no more than 50 people are admitted per day. The area belongs to the Duna–Ipoly National Park and has been protected since 1982. The cave is part of the Buda thermokarst system, which is on UNESCO's Tentative List for World Heritage status.