Nothing special, city center is a large place, it is ok for a evening walk.
Sibiu is one of the big cities in Transylvania. The old town is really beautiful, especially in winter when it's covered with snow. Two days would be a good enough time to see all the attractions but it would be good to stay longer and enjoy beautiful Transylvanian city.
Sibiu is a fantastic small city and one of the seven original fortresses of Saxon Transylvania. It's a lively town with a handsome old city with some historic attractions and museums.
realy beautiful and good renovatet City, of course lots of other tourists but the old City is a must if you are there. a Little bit ca. 15 KM in the east is a campground, Near the Center are a lot of parkinglots not expensive.