Schönberg Cave System

The Schönberg cave system in the Dead Mountains is with a currently known length of over 155.018 m the longest cave in Austria. It got its name after the connection of the approximately 33 km long Feuertal-Höhlensystem with the approximately 86 km long Raucherkarhöhle was discovered. The overlying Schönberg-Höhlensystem (2093 m) gave the system its name.

The widely branched cave with 35 entrances is located at Bad Ischl in the border area between Upper Austria and Styria. The area around the Schönberg cave system is researched, measured and mapped by the Landesverein für Höhlenkunde Oberösterreich. The Schönberg cave system is located at place 14 on the list of the longest caves in the world.

Within Europe there are longer systems on the territory of Ukraine (Optymistychna Cave), Switzerland (Hölloch, Siebenhengste-Hohgant-Höhle) and Spain's (Sistema del Alto). It is the 14th longest cave system in the world.