The ancient fortress of the Alhambra has a fascinating history, passing from Moorish sultans to Catholic kings. Today it is one of Spain's most visited tourist attractions and is listed as a UNESCO World Heritage site.
However, very few know of the secret world of the Alhambra that lies unseen below the surface a hidden network of tunnels and dungeons, off limits to tourists, that are still being uncovered and understood by archaeologists today.
Video by Izabela Cardoso and Fernando Teixeira
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