The biggest ice caves in the world are near the Austrian town of Werfen. To get there, you need to walk about 20 minutes from the parking lot, take a funicular and walk another 20 minutes as the caves are at the top of a mountain. Once inside, the guide will take visitors through a track, explaining geological history of the cave and its discovery. The caves are not lit and visitors are given a flashlight to see inside the cave. You get good views of the Austrian Alps.