Another excellent day trip is to see the largest ice caves in the world. Take the train 48km south of Salzburg to Werfen, from there you can take a taxi-bus to the parking area at the base. There is a cable-car (€9 roundtrip) up to the cave entrance or if you feel really fit you can walk up. The caves stretch for about 42km over several levels from 1500m above sea level with frozen waterfalls, dramatic ice formations and cavernous interiors. Daily tours operate May-October 9am-4.30pm every half hour, a combined tour and cable car ticket costs €17. Appropriate footwear and clothing for cold temperatures is essential.