Shannon Pot
Shannon Pot or Legnashinna () is a pool in the karst landscape in the townland of Derrylahan near Cuilcagh Mountain in County Cavan, Ireland. An aquifer-fed naturally fluctuating pool, it is the traditional source of the River Shannon.

The pool itself is about wide, and has been dived to .

Towns and villages near the Shannon Pot include Dowra, Blacklion and Glangevlin.
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karst landscape
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Derrylahan
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Cuilcagh
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County Cavan
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Ireland
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aquifer
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River Shannon
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Dowra
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Blacklion
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Glangevlin
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Shannon Pot
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Shannon Pot
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historic county
basin country
lake outflow
historic county
country
country