Traces of settlements in the prehistoric Kakushöhle between Eiserfey and Weyer reach back to 80000 B.C. Hunter -gatherer groups of Neanderthals left numerous stone tools and animal bones from the middle Palaeolithic eras. Mammoth, woolly rhinoceros, reindeer, musk ox, prairie bison, giant deer, cave bears and lions, and many more.
A legend says that a giant called Kaku lived in the cave system. The Kakushöhle and surrounding area can be explored closely on a hike from the Eifel loop trail.