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.”
Thames River Sightseeing
Discover London from the Water. Offering stunning views of iconic landmarks, eco-friendly cruises, and engaging commentary, it’s the ultimate way to explore the city’s history and charm. With hop-on, hop-off convenience, Thames River Sightseeing turns every journey into an unforgettable adventure along the heart of London.
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Opening Hours
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10.20am - 4.40pm
10.20am - 4.40pm
10.20am - 4.40pm
10.20am - 4.40pm
10.20am - 4.40pm
10.20am - 4.40pm
10.20am - 4.40pm
Amenities
Wheelchair Access
Toilets
Food & Drink
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