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Covão dos Conchos

Despite its appearance, this surreal opening in a Serra da Estrela Lagoon is not actually a portal to any other time or place, but an artificial funnel that leads water through a long tunnel. Although it looks like a natural hole lined with waterfalls, Covão dos Conchos is, in fact, an engineering marvel.

Serra da Estrela
3h30 - 309 km to Lisbon
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