Genoa, Italy
Saying Genoa has a lot of palaces is like saying Venice is full of canals. Still, they are one of the defining features of a city that has one of the biggest old towns in Europe, ideal for exploring on warm autumn days. More than 100 Renaissance and baroque palaces are still standing, 42 of which comprise the Unesco-listed Palazzi del Rolli. Lots are open to the public.