The City is very nice, historical and there is sea and mountains
Dolomites - hiking, walking, ferrate, climbing, just sightseeing
Cities & towns - Venice but don't stop at that, Trevise, Verone, Trieste, smaller lovely towns deprived of the obvious tourist traps to be found in Venice, lots of art, architecture
Salsa - clubbing, courses, rueda... just follow the guide!!!
nothing special, but there are some beautiful countryside, mountains, great wines