Check out Werfen Ice Caves
The caves deserve to be officially recognised as one of the new 7 wonders of the modern world. The network of caves make up the largest system of ice caves in the world. It literally is a different and breathtaking visit (and not just because of the cold!), the scenery of the ice and water formations are simply awesome. It’s a definite ‘must see’ and worth a full day out, but make sure you bring warm clothes!