you can walk, explore, swim (in summer), and obviously climb...
hundreds of sport climbing routes, and some really fun multi-pitch ones. Try out Spigolo Verde, an easy route that will take you to the cippo Comici. You will love the view and the unique atmosphere.
"After the first glass, you see things as you wish they were. After the second, you see things as they are not. Finally, you see things as they really are, which is the most horrible thing in the world."
--Oscar Wilde on Absinthe