Wulfbachquellhöhle, Cave entrance in Mühlheim an der Donau, Germany
Wulfbachquellhöhle is a cave in Mühlenbach an der Donau extending about 6500 meters underground with water-filled passages and limestone formations. The Wulfbach spring water has carved these underground structures over a long period of time.
The cave was first documented in 1879 and its water source supplied local communities until 1938. The water stopped being used after typhus cases led authorities to close it.
The name links Wulfbach, the spring water source, with the German word for cave, following local tradition in naming natural underground formations. Visitors can still observe this connection between water and stone in how the landscape is shaped.
Access to the cave requires professional diving equipment and prior authorization, as the narrow entrance passages are water-filled. The water maintains a constant temperature of about 9 degrees Celsius year-round.
The Wulfbach spring produces between 10 and 200 liters of water per second and once powered several mills in the surrounding region. This large water output made the area particularly valuable for local industry.
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