Considered one of the 7 wonders of Portugal, located in the Sierra de Mira d’Aire.

The erosion caused by water in the basement created, over millions of years, wells and underground galleries, where large amounts of water flows would have passed-through, leaving now beautiful caves with spectacular stalactites and stalagmites to admire.

The temperature inside the caves, is on average 18 ° C. According to the “Inventory of Caves of Portugal”, the Portuguese Speleological Society, in the parish of Fatima we can find a concentration of 43 caves of the 53 mentioned in this inventory.