Contest #443: Dam at Covão dos Conchos, Serra da Estrela, Portugal


One of several lakes in the Serra da Estrela region of Portugal, Covão dos Conchos sits near Long Lake. When engineers wanted to create a lake here by damming the stream, they envisioned the water flowing from this lake to Long Lake. Although this lake is higher in elevation than long lake, there is a area between the two that is higher than either one.


Since water doesn’t usually travel uphill very well, they came up with the idea of a long water tunnel fed by this funnel.

Those who found the holy lake before the hint included:

  • Eloy Cano
  • hhgygy
  • Garfield
  • Phil Ower
  • Lighthouse
  • Lelie
  • Junebug
  • Ann K.
  • RicardPG
  • joe9000

None after the hint