First, you'll be asked the date you plan to be there and for how many days.
Then you can base your vacation around your kids, outdoors, culture, or "the best of" for a first-time visitor.
Maybe you want to rest. There are suggestions for you as well as for the ones who want to see everything.
Depending on how much you want to spend, the site provides hotel choices (then you make the reservations on your own.)
After calculating, your days' itineraries are shown. Often you will be traveling "by walking" and the approximate time is included.
A fun site. I suggest you try it.