Hi Jules,
Oops! I hadn't returned to this thread and just realized that I didn't reply to your last question. Sorry...
Since Varenna was our last destination (at the end of our two week trip), my mom (87 at the time) was too tired to do much sightseeing. [We did not visit Villa Balbianello]
I'd wanted to visit Villa Carlotta, but when my mom saw the many steps leading to it's entrance she changed her mind, so we didn't get off the ferry and went to Bellagio instead.
We mainly enjoyed the beautiful scenery while strolling on the lakeside promenade, eating gelato, and visiting the lakeside villages from the ferry.
The day we arrived was a beautiful sunny day, and we took the ferry (bought the mid-lake day pass) and toured the lake before disembarking in Bellagio. We had fun browsing through some of the shops, and enjoyed a delicious lunch at a Ristorante BabaYaga in the historic center.
After lunch, we walked along Via Eugenio Vitali to Parchetto della Punta, a small park at the tip of Bellagio with magnificent views of the lake.
On our last day, we ferried to Bellagio, then took a bus to the city of Como. The bus to Como was enjoyable as it offered a bird's eye view of the turquoise lake below. When we arrived to Como, it began to rain so we found refuge in the beautiful cathedral. We also enjoyed the most delicious pizza of our trip at Locanda Barbarossa which was packed with locals. Our table was near the pizza oven and we were mesmerized by the aroma and the sight of the various pizzas coming out of it.
Wishing you a wonderful trip!