Travellers like the castle of Krak Des Chevaliers. It's a real fortress placed high on a hill with double walls, round watchtowers and everything. It was originally built in 1031 by a local emir, but invaded by the crusaders in the tenth century, who made it an important stronghold on the route to the Holy Land. During that time, it was extended with an outer wall which made it impenetrable. In the end, the castle got sieged by Mamluk forces in 1271, and the outnumbered crusaders withdrew and left the castle to the Mamluk sultan. They continued the enforcement of the castle in their oriental style, so today it's a big mix of everything.