Various deposits from both maars can be discovered through the 124 meter long and centuries-old connecting tunnel between the Ulmer Maar and the Jungferweiher. You shouldn't be claustrophobic because the underground passage is only 70 centimeters wide at the narrowest point. Old layers of rock change color and consistency around the middle of the tunnel.
Very exciting and a very worth seeing Eifel volcano excursion destination!
Негізгі бет Ulmener Maar tunnel with rock layers of changing colors between Jungferweiher & Ulmener Maar
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