Slung high on a wooded clifftop and cowering beneath the majestic peaks of the Tennengebirge range, Burg Hohenwerfen is visible from afar. For 900 years this fortress has kept watch over the Salzach Valley, its current appearance dating to 1570. The big draw is the far-reaching view over Werfen from the 16th-century belfry, though the dungeons (displaying the usual nasties such as the iron maiden and thumb screw) are also worth a look.
The entry fee also covers a falconry show in the grounds (11.15am and 3.15pm daily), where falconers in medieval costume release eagles, owls, falcons and vultures to wheel in front of the ramparts. There is commentary in English and German.
Both the fortress and the ice caves can be squeezed into a day trip from Salzburg; start early, visit the caves first and be at the fortress for the last falconry show. The brisk walk up from the village takes 20 minutes.