The 0,5-1 million-year-old Szemlő-hegyi Cave is often called “Budapest’s underground flower garden”. The cave was discovered in 1930. After a long period of research and construction of visitor facilities the cave was opened to the public in 1986. The most beautiful parts of the cave can be observed during guided tours along the 300 metre long tourist path; these parts are characteristic of thermal karst formations. You can see walls covered with thick layers of mineral deposits that are unique in Europe: splendent, white crystals of gypsum, popcorn formations and calcite plates. The comfortable and safe walkways and modern lighting make the tour even more enjoyable.