United Frequent Flyer miles... best use for Europe (?) travel in May?

Thanks. Keep the input coming. I appreciate it!

I have a lead on an apartment in Rome. Also a lead on a rural village option (near Near Pisa, Lucca and Florence ). But… DH and I have had a taste of Italy from the 2012 cruise (Pompei/Sorrento & Rome & Florence)… so I’d want to see new areas too. DS favors Germany. But interestingly he wants to go back to Venice which he saw on a school trip … yet he thinks Rome might be too “touristy”… I think he’d like Rome.

A down side for Italy-only is the ugly logistics both ways for Frankfurt layover. But saving grace there is passes (alas, only two) for United lounge.