The Eisriesenwelt (Ice Caves) in Werfen is a massive ice cave that is part of a system of natural limestone and ice caves in Werfen. Based on the Hochkogel mountain in the Tennengebirge region of the Alps, the network of ice caverns was formed by tectonic plate movements over 100 million years ago and stretches for over 26 miles. The mighty entrance to the caves is 65 feet high, and the first mile of the system features breathtaking gigantic ice formations, which can be explored on guided ice cave tours.

5450 Werfen, Austria