You could enter desired sequence: Adelaide Grampians National Park Melbourne. Easy to visit Grampians in default 2 week duration. Adelaide will be start, Melbourne finish. Grampians travel-thru. But the point that Grampians had to be proposed by AI is useful. Taken.

Grampians National Park is present in Knowledge Graph, possible to enter as waypoint. Why it's overlooked (or bypassed)? Good question for us, will investigate... That's why showing it here!

Not sure what your inputs are, but perhaps a rule of thumb (if not there already) is to generate a list of attractions sorted by quantity of reviews on (eg) trip advisor and then compare that result with #of people who actually go there.

It could give you the chance to rank 'must see' weighed against 'off the beaten track'. (Oz has heaps of 'off the beaten track' that the hordes of tourists don't know about)

This is tricky. We don't know who landed on the page. How to propose Paris in France without Eiffel Tower? OK if user explicitly checks "avoid 'must see'" or "avoid overtourism". Then possible to propose different stuff. One traveler told me exactly this, a week ago. Maybe we will implement this feature.