The Allander stalactite cave is located in the 476 m high mountain in the book Alland, and was opened in 1928 as a show cave. It is one of the Lower Austrian nature monuments.
The cave is 70 meters long and 12 meters deep, the rock arch about 3 x 3 m tall. The courses are 1 m to 12 m high. It has all the caves under the Vienna Woods on the far most stalactites: There are Perlsinter, ceiling stud to see stacks of water, milk and mountain Laugungsnischen. The attraction is largely complete - 10,000 years old proven - brown bear skeleton. The cave fauna and flora is an international research project.