On the other hand you could simply marvel at the amazing details, imposing structures or just wander around watching the locals playing cards, majong, chess, dancing around or flying kites, showing off their song birds, writing poetry (with an oversized brush) waving flags...

There is so much to see that it is well worth at least half a day, maybe a whole day if you have the time.  But most important of all, do not go on a guided tour as you will find yourself whisked past the interesting bits and shepherded around the "important", but somewhat tedious "cultural" bits.