Gravensteen (Castle of the Counts): Even more than 900 years after it was built, the castle of the Counts in Ghent can still summon up a chilly feeling of dread as you look at its gray stone walls. It's a grim reminder that castles were not all for chivalrous knights and beautiful princesses; this one was intended as much to cow the independent-minded citizens of Ghent as to protect the city from foreign marauders. Inside are the tools of the autocrat's profession: torture instruments that show that what the Middle Ages lacked in humanity they made up for in invention.