I love walking here! Avoid in winter or summer, since it's a long walk under the sun/wind.
It is really cheap (just 1,000) and besides exercising your general fitness, you can also enjoy this historical site and recreate stories in your head.
I have heard that many historical dramas were shoot here.
There are also free shows on weekend. I have seen the one of the martial arts with swords and other weapons, which was really cool to watch, and even got to take pictures with the actors. Go on a saturday or sunday for a relaxes stroll!