Banaras! known as the oldest city in the world. So best experience is when you see all ghats adjacent to each other but there are 365 ghats.
As believed if you take a day to see only one ghat then it takes an year to see all the ghats.
For best experience of Banaras (varanasi) go and watch morning aarti at assi ghat and take a boat ride after that.
After taking boat there is one activity which will fascinate you the most that is bird feeding. The Oarsman will tell how to feed them also they will make some different sound which attracts the birds. This is a once a life time experience that one should definitely try!!
There are many boats which will be available in the morning just to cater you. They will tell you the stories about each and every ghat, not in deep but a glimpse of everything.
So, this is the best experience that one can avail if you are in BANARAS!!!