Alland Cave, Natural monument cave and geological museum in Buchberg mountain, Lower Austria.

Alland Cave extends about 177 meters into Buchberg mountain and features naturally formed stalagmites and stalactites throughout its passages. Visitors can walk through roughly 70 meters of it on guided tours, seeing these delicate stone formations up close.

The cave was opened as a show cave on 21 June 1928 and has been a Lower Austrian natural monument since 30 July 1949. It was originally known as Frauenhöhle and Frauenloch. Excavations on the Buchberg brought up objects of antler, bone, stone, clay and occasionally bronze and iron, showing prehistoric and early historic settlement.

The cave's original name was Frauenhöhle, or Frauenloch, before it became known as Tropfsteinhöhle Alland. Local legends tell of kindly white women and malevolent black women living inside, and of a lake within the mountain. A tale also claims a passage links it to Arnsteinhöhle, about three kilometres away.

The show cave is entered through a roughly 3 m high and 2.5 m wide portal on the Buchberg, south of Alland; 70 of the cave's 177 m are open to visitors, with 25 m of height difference between entrance and deepest accessible point. Passages reach up to 12 m in height, so the route involves steps and uneven ground. The cave lies near Alland in the Baden district, about 28 km southwest of Vienna.

The cave's original name was Frauenhöhle (Women's Cave), later also Frauenloch. Legends tell of kindly white women and malevolent black women living inside, and of a lake within the mountain. A supposed passage is said to link it with Arnsteinhöhle, about three kilometres away.