Fellner-Doline
Fellner-Doline, Natural sinkhole in Gößweinstein, Germany
Description
Fellner-Doline is a funnel-shaped sinkhole with dimensions of roughly 100 meters by 40 meters and a horizontal cave entrance at its base. The depression formed through the dissolving of limestone by water, creating an underground passage system beneath the surface.
History
This karst formation was first scientifically explored in 1899, reaching a depth of around 30 meters into the underground system. The early exploration revealed that the sinkhole connects to a larger network of water channels across the region.
Culture
The geological trail connecting this sinkhole to a major regional spring shows how water shapes the land over long periods. Visitors along the route learn about the distinctive rock layers that make this area geologically special.
Practical
Access to the cave system requires specialized caving equipment and technical skills, as the natural entrance presents steep challenges. It is advisable to visit with experienced guides who understand the hazards of underground karst exploration.
Did you know?
The underground system connects to one of northern Bavaria's most powerful karst springs located about a kilometer away. This hidden network demonstrates how the earth's interior creates complex pathways that shape the region's water systems.
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