An underground fairytale world: Szemlő-hegy Cave and Pál-völgy Cave
The Szemlő-hegy Cave is one of the most beautiful cave systems in the capital. It is called the "underground flower garden of Budapest" because of its incredible geological formations. On the 300-metre route, which takes about 40 minutes to cover, you can admire pisolite formations and gypsum crystals, which are rare sights in Europe. You can even take your baby buggy down with you. Make sure to watch the 3D film and see the interactive exhibition as well.
The nearby Pál-völgy Cave is another exciting excursion spot with its gap-like corridors, large changes in altitude, scallops formed by hot water and fabulous stalactites. The Pál-völgy Cave is the longest cave system in Hungary. You can go on a one-hour guided tour and see a 500-metre trail (out of the currently known length of almost 32 kilometres). The path in the cave leads through more than 400 steps and on a seven-meter-high, secure ladder with railing, which is why children under the age of five and shorter than 115 centimetres are not allowed in.