11 Replies to “Contest #443”

  1. Correction, the sink hole is part of the Conchos Hydroelectric system.

  2. Covao dos Conchos, in Serra da Estrela, Portugal

    40°21’50.03″N 7°36’38.13″O

  3. Covão dos Conchos
    Lagoa da Serra da Estrela
    Guarda District, Portugal
    40.364032 -7.6109730

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