Our trip to Ghent was somewhat organized. As in, we knew that drinking Belgian beers, enjoying the sunshine and taking lots of pictures were our top priorities. So what else is there to do in Ghent? I'd recommend having a visit to Gravensteen, the medieval castle located smack dab in the city center. Bonus: it's just around the corner from a bakery with speculoos cupcakes.
The castle's original structure was built in the 12th century. We didn't purchase the audio guide and honestly, I kind of regret this since informative signs were sparse throughout. But, that's okay because the exhibits consisted mostly of torture devices and medieval weaponry which aren't very high on my list of interests.
If you're limited on time, skip the torture chamber and hike straight up to the top. The city views alone are worth the entry fee.