Wind hole in the Mühlenberg, Natural cave entrance in Ründeroth, Germany
The Wind hole in the Mühlenberg is a cave entrance located in the Bergisches Land region of Germany. The cave extends deep underground with large chambers and passages carved by water movement over millions of years.
The cave formed approximately 60 million years ago during the Tertiary period through water erosion in limestone and dolomite layers. This geological process shaped the underground landscape over an extended timespan.
The site holds scientific value for researchers who conduct geological studies and document the underground structures of the Mühlenberg cave system.
The cave is not open to visitors and cannot be entered. You can visit the nearby Aggertalhöhle cave instead, which offers guided tours with information about the region's cave systems.
The name 'Windloch' comes from strong air currents that constantly flow through the cave system and can be felt at the opening. This happens because of natural pressure differences between different parts of the underground network.
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