Venessia

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Venessia was a planet visited by the First Doctor.

He was unable to remember whether it was Venessia or Enlandia that was a "strange place" where there was no land, only water and a "peculiar form of crystal ice" that giant eels squirmed beneath; it was the last place where all of the TARDIS instruments gave steady, consistent readings before it did so again onboard the Ark. (PROSE: The Ark)