The landscape of the Zirbitzkogel-Grebenzen Nature Park owes its present appearance to the events of the Ice Age. About 10,500 years ago the last cold period of the ice age ended. The mighty ice masses of that time formed the Neumarkt pass landscape as well as the high valley of St. Lambrecht. However, temperature fluctuations also led to drastic changes in fauna, flora and humans.
On the EISZEIT island in Oberdorf (Mariahof) the different themes can be understood and admired. At EISZEIT INSEL, the most important topics concerning the Ice Age and the landscape-shaping effect of the Murg Glacier in the Nature Park are shown by information boards and some interactive stations. Thus the EISZEIT island in Oberdorf not only serves as an information platform, but is also the starting point for the two circular hiking trails "Ab durch die Grundmoräne" and "Der Gletscher in der Sackgasse". In St. Lambrecht the circular path "Eisstausee St. Lambrecht" invites you to follow the traces of the ice age. Information panels were erected to report on glacial processes. Three circular paths and the "Geocache" experience lead through the landscape shaped by the Ice Age and show the forms of erosion and accumulation as well as the remains of a mighty 5 km long ice reservoir.
Information on geocaching can be found "http://www.geocache.at/cms/faq/37-allgemein/244-erste-schritte-mit-geocaching" here.
The circular route "The Glacier in the Dead End" leads through the area between St.
Blasen and the Thajagraben.
The high valley of St.
Lambrecht represented a dead end for the Murg glacier in the last part of the cold period.
The gentle moraine slopes, the witnesses of the melting glacier and the deep cuts of the Thajabach into the landscape characterise the landscape along the circular path.