The 11th-century Festung Hohensalzburg (Hohensalzburg Fortress) is the high point (literally and metaphorically) of a visit to Salzburg, offering a stupendous northern city view from its 120m (400ft) elevation. The view to the south is of Alpine peaks, including the 1853m (6080ft) Untersberg.
Mozart-WohnhausOf the two Mozart museums in town, both of which are popular and pricey, this is the better one. The Mozart family lived in this house from 1773 to 1787, although Mozart himself was only resident from 1773 to 1780. Tours include commentary and musical excerpts from handheld devices activated by infrared signals.
Haus Der NaturYou could spend hours roaming around the diverse and well displayed exhibits at the Haus Der Natur (Museum of Natural History), located in the centre of the old city. There are flora, fauna and mineral displays, exhibits on physics and astronomy, a 42-tank aquarium, a reptile house and plenty of live creepy crawlies.