Cadomin Cave, Limestone cave in Whitehorse Wildland Provincial Park, Canada
Cadomin Cave sits within Leyland Mountain at 1890 meters elevation and contains spacious passages connected by narrow crawlways beneath the Canadian Rockies. The system extends for more than 2700 meters and reaches a depth of about 220 meters, with a central chamber known as Mess Hall.
The first formal survey of the system took place in 1959, leading to mapping of the upper passages and the central chamber. Scientists later expanded the known sections after discovering additional passages that changed understanding of the entire structure.
Indigenous peoples were familiar with this underground system long before prospectors arrived during early 20th century mining exploration in the Coal Branch district. The cave represents an ancient landmark that held meaning for communities living in the surrounding mountain regions.
Access to the system is currently not possible as the cave has been closed by government order since 2010 to protect bat populations. The closure prevents the spread of a fungal disease that threatens hibernating wildlife.
Speleologists later discovered additional passages that revealed the system was considerably larger than originally believed. These findings show how much about underground structures remains unknown, even in documented caves.
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