12-Day Italy Honeymoon Review: Rome, Siena, Cinque Terre, Venice, Wine Tour, Neighborhoods, History, Opera & Food

It is hard to pinpoint one specific thing.
For Rome - it was wandering the backstreets at night, seeing the Trevi fountain lit up, and our tour guides for seeing the Roman ruins and the Vatican City. Also the food - the food was excellent and very fairly priced.
For Siena - even more beautiful than we could have pictured. We loved the neighborhood feel of it. We took a cooking class and wine tour - both were fantastic and especially memorable. We also went through a neighborhood party celebrating their Palio win from a few months prior - it looked very fun! This was our favorite hotel of the stay - the staff was great, gaving a coffee in the garden was memorable, and the room and balcony were so nice. 
For Cinque Terre - so beautiful. We loved the hikes and the wine. The Wed night opera in Vernazza was also especially memorable. This was probably our favorite leg of the trip.
Venice - just seeing the unique city was very memorable. We loved the boat ride from the train station to the hotel, as it was an excellent intro to the Grand Canal. We took a walking chichetti tour with a guide, and it was really enjoyable.