We will be in Nice for 6 nights/5 full days in late October. Would love suggestions of what to do while are there. Is a day trip to Monte Carlo worth it?
I definitely recommend a day trip to Antibes. The Picasso Museum is a treat, as is the town itself. Also, Villefranche-sur-mer, in the opposite direction. I also recommend getting a Pass SudAzur Explore. It's ideal for exploring the entire Alpes-Maritimes region (including buses, trams, and regional TER trains). A 3-Day Pass is €35 and a 7-Day Pass is €50. We got the 3 day pass when we were in Nice last September and it was perfect for all our transportation needs.
I took the bus to Monte Carlo for like €2. Fabulous views. Visited the aquarium where Jacques Cousteau worked, as well as Prince Rainier's car collection. I was with a 12yoa boy, so... Didn't go to the casino, as I had already been.
In Nice itself, the Chagall Museum was great. We were there in late November and pretty much had it to ourselves. Castle Hill offered a stretch of the legs and fantastic views. I loved shopping at the market at Liberation.