This 29km-long cave – the second largest in Hungary – was discovered in 1904 and is noted for its spectacular stalactites and rock formations. Tours cover 500m, last an hour and depart hourly from 10.15am (last tour at 4.15pm) from the lowest level, taking you through dank, claustrophobia-inducing passages and up several hundred steps. Highlights include John's Lookout in the largest chamber, as well as Radium Hall, reminiscent of Dante's Inferno. The temperature is a constant 11°C, so wear a jacket or jumper.
Reach here on bus 65 from III Kolosy tér in Óbuda and alight at the Pálvölgyi-cseppkőbarlang stop.
