The hidden world beneath the ancient Alhambra fortress

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