It is famous 4 its food
Austria is famous for it's Apfelstrudel and Pez candy.
Traditionally, Austria has been famous for its music (for composers like Mozart, Haydn, Johann Strauss...
There is no one site that is more well know than the others. Some of the more famous sites are the Jeita Grotto, Pigeon Rocks (Rauche), Baalbek Ruins, Martyr's Square, La Place D'Etoile (Star...