In 1968 Walter Knezicek and Günther J. Wolf discovered two shafts and the Knesi-Harnisch at the right hand edge of the Halle der Vereinigung, which all led down into a tunnel about 10 metres below.

In 1970 Hannes Jodl found the Postkastl ("Postbox") at the left hand end of the Halle der Vereinigung, which turned out to be a continuation of the Spannagel Cave.

The years 1972 to 1975 saw four survey expeditions by the State Caving Club in Tyrol (Landesverein für Höhlenkunde in Tirol), that advanced as far as the Gneisbach stream.

In 1975, as part of a research week by the Groupe Spéléologique Luxembourgeois with E. Jacoby, M. Möller, G. Mutschlechner and B. Schmitz, the course of the Höhlenbach stream was established.

A 50-hour expedition led by E. Jacoby in 1976/77 discovered and researched the Spinnengang passage, the Mutschlechner-Dom cavern and the Schatzkammer chamber.

In 1984 German speleologists in the Tyrolean Caving Club under the direction of C. Cavelius surveyed the South System (Südsystem).

In 1987 and 1988 the entrance area of the cave was cleared out, and the gallery joining the Trümmerhalle and Gneisbach were discovered and surveyed by W. Mayr and G. Völkl.