Hermannshöhle, Natural monument cave in Kirchberg am Wechsel, Austria.

Hermannshöhle is a show cave in the Eulenberg cliff northwest of Kirchberg am Wechsel, with labyrinthine passages on several levels covering 73 metres in height and 4,277 metres in length. Its main entrance is the Windloch at 627 metres above sea level, and visitors exit through the Taubenloch. The cave contains stalactites, stalagmites and deposits of mountain milk.

The cave received official protection status as a natural monument in 1931, initiating systematic preservation efforts. This designation marked the start of concentrated conservation measures for its geological formations.

The cave is named after Hermann Steiger von Amstein, who explored it in 1843 and found the passage to the Windloch. The name Hermannshöhle first appeared in a travel account in 1845. Since 1968 the Hermannshöhlen Research and Conservation Association has managed the cave.

Visitors can explore the cave through guided tours offered from May to October. Sturdy footwear and warm clothing are recommended since the cave remains cool year-round and some passages are damp.

Hermannshöhle holds 17 bat species, the highest count of any cave in Austria. The lesser horseshoe bat is the most common, followed by the Natterer's bat, and around 3,000 bats hibernate here each year. The cave is also the only known Austrian site of the 1.5 mm crustacean Bathynella natans, which lives in its groundwater.