Grutas de Mira de Aire
The Mira de Aire Caves are one of the 7 Wonders of Portugal.The Mira de Aire Caves are the largest tourist caves of Portugal. Its extension has already reached 11kms, but only 600 meters can be visited. The size, beauty and ecological importance of groundwater associated with periodic flooding led to ratings as Public Interest (1955). It is historically associated with the founding of the Portuguese Speleology Association, and the complexity of the underground network permanently attracts cavers who regularly carry out new investigations and discoveries.
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