Rumbling Hole, Limestone cave in Leck Fell, Lancashire, England
Rumbling Hole is a limestone cave on Leck Fell in Lancashire with an entrance shaft that descends sharply into the earth. A small waterfall runs alongside the opening, and trees grow around the rim that serve as natural anchor points for entry.
The cave was first mentioned in Jonathan Otley's travel guide about the English Lakes in 1842. The first complete descent took place in 1932 and marked the start of modern exploration.
The Lancaster University Speleological Society established a connection between Rumbling Hole and Lost Johns' Cave in 1985, expanding the Three Counties cave network.
Visitors must book in advance online through the Council for Northern Caving Community to meet landowner requirements and secure access. Planning ahead helps coordinate visit times and ensure smooth entry to the site.
The Dead Bobbin Series is a cave system discovered later that extends through separate routes away from the main passage. These lesser-explored passages offer pathways that differ from the primary entry point.
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