Granted that these sights/sites are different, in order to come away from your trip wanting more rather than being jaded with cathedrals/castles/museums....
If you had a relatively equal amount of time in each of these cities, which of the following would you choose to spend your time in, and why?
Notre Dame (Paris)
Sainte Chapelle (Paris)
St. Peter’s Basilica (Rome)
St. Paul’s (London)
Westminster Abbey (London)
Yorkminster (York)
(Okay, okay choose 2 or 3!)
Thames cruise (London)
Seine cruise (Paris)
Warwick Castle (England)
Chenonceau (Loire region, France)
Vatican Museum (Rome)
British Museum (London)
Louvre (Paris)