Cave de Tyron (Fortress of Niha)

Also known as Chqif Tayroun, Fortress of Niha, Qal'at Niha

Troglodyte fortress carved into a sheer 100-metre cliff over the Bisri and Aray valleys, guarding the road between Sidon and the Beqaa. First mentioned in 975 CE and held by Druze leaders in the early twelfth century, it was integrated into the Lordship of Sidon around 1170. Rock-cut chambers, deep silos, and a spring-fed cistern system allowed it to withstand long sieges. Sold to the Teutonic Knights by Julian of Sidon in 1256; lost in 1261; rebuilt by Baibars in 1270.

Coordinates: 33.5389°, 35.6156°

Read more on Wikipedia: English article