| − | The '''Easegill System''' in the [[Pennines]], is with over 60 miles of known passage, the longest [[cave]] system in the [[British Isles]]. It is also known as the '''Three Counties System''' since it straddles the borders of the three counties of [[Yorkshire]], [[Cumbria]] and [[Lancashire]].
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| − | After many years of exploration and water-tracing studies, sometimes employing mining and explosives to gain access to narrow passages and clear rockfalls, and [[cave-diving]] to explore submerged passages, cavers have connected several of the largest cave systems in the [[Yorkshire Dales]], on the flanks of Gregareth Hill, into a single system. These include Aygill Caverns, Bullpot of the Witches, Easegill Caverns, Pippikin Pot, the Leck Fell system and Long John's.<ref>http://www.rrcpc.org.uk/ease.htm</ref>
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