Szemlő-hegyi Cave
Thermal-water cave with walls of grape-like mineral clusters, gypsum crystals and popcorn stone.
Location
About this audio guide
This guide to Szemlő-hegyi Cave in Budapest starts with a 1930 quarry blast that tore open a hillside and uncovered an unusual cave, among those watching a young man named Hubert Keszler who would spend decades studying it. It explains how the cave formed backward from most others, built up by mineral-rich thermal water rather than carved by it, leaving walls covered in grape-like clusters and gypsum crystals. Look closely at the stone as you pass; locals call it Budapest's underground flower garden.
This audio guide was created using AI.
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