Marienglashöhle Friedrichroda

This former gypsum mine was operational from 1778 to 1903. Here you will find in-depth information about the development of the Thuringian Forest and the more than 400-year old mining tradition around Friedrichroda. Geological windows left and right in the walls of the 110 m long entrance tunnel enable the visitor to look at the rock layers. Once inside the crystal cave, you can marvel at the fascinating gypsum crystals, from which the name of the cave is derived. Before the cave was discovered, the mine was called "Herzog-Ernst-Stollen" after Duke Herzog Ernst I the Pious von Sachsen-Gotha-Altenburg.



An der B88
99894 Friedrichroda
Telephone: 03623 311667

info @


Opening hours:

April – October 10:00 am - 5:00 pm
November – March  10:00 am - 4:00 pm

Special tours are available outside opening hours on request.


For more information visit the official website of the town Friedrichroda at