A horizontal lead miners’ adit (a level tube driven horizontally into the slope) leads to the cavern itself, a limestone cave, 200 metres below earth. Because the small adit is always flooded, entrance to the cave is only possible by boat after descending a lengthy stairway. The cavern opens up at the end of the adit, featuring fluorspar veins, stalactites and stalagmites, and the “Bottomless Pit.”
North Hertfordshire Gallery
Journey through time and see how our area changed and developed through prehistoric, Roman, medieval, Victorian and recent history.
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10:30am - 4:30pm
10:30am - 4:30pm
10:30am - 4:30pm
10:30am - 4:30pm
10:30am - 4:30pm
10:30am - 4:30pm
11am - 3pm
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Wheelchair Access
Parking
Toilets
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