Hirschzungen Erdfall im Hainholz

The Hirschzungen sinkhole has steep and partially overhanging walls. Its age is estimated at around 500 years. The collapse of the underlying karst cave took place in historical times.
The deer tongue is a fern that needs shady and moist steep slopes on limestone or gypsum soil. These requirements are very well met in the approximately 10 m deep sinkhole,

The Hirschzungen sinkhole has steep and partially overhanging walls. Its age is estimated at around 500 years. The collapse of the underlying karst cave took place in historical times.
The deer tongue is a fern that needs shady and moist steep slopes on limestone or gypsum soil. These requirements are very well met in the approximately 10 m deep sinkhole,

The deer tongue is a fern with a simple leaf and is considered rare. She loves soaked rock walls and subsoil with little soil. The northernmost deposit known to me is in front of Smoo Cave in northern Scotland. There is also a small stock growing in a column in the Roman Forum. There are several deposits in the gypsum karst area of the southern Harz.

With the surrounding vertical walls, this is a prime example of a sinkhole. Here is also the most impressive stag-tongue fern occurrence in the region that I know of. Sporadic occurrences occur again and again along the karst hiking trail, but they are not as noticeable as here in the sinkhole. Deer tongue fern is under nature protection.

A beautiful section on the karst trail with lots of information.

Here you can really discover the different karst phenomena.

The Jettenhöhle is really cool: Unfortunately there is no sign. A small path leads up. Climbing is the order of the day upstairs. Be careful not to slip!

This sinkhole has a very beautiful vegetation with the deer tongues. You have to see it!

It's a lot of fun to be on the road here

Great, the karst hole with the rustic fern on the bottom. If a few more dinosaurs showed up now, the picture would be perfect!

The chest landscape is a real eye-catcher! A lot of information can be read on the boards!

The karst area has some treasures. Unfortunately the horse pond is still dry at the moment. But if you choose the small Rudnwanderweg from the car park on Düna, it will be guided impressively through the karst landscape. But stay on the paths! Kart cones and sinkholes are dangerous

Great natural forest!