About 120'000 m3 extracted rock turned our fascilities to a fascinating place in the underground. Discover our the tunnels and underground caverns.
Creating electricity from water is wonderful technology: hidden in the mountains, built for generations and absolutely safe. A pleasure for visitors to experience.
Up until 1,900 years ago a terrifying dragon is said to have been up to mischief in a large cave at Lake Thun. Only the wandering Irish monk Beatus succeeded in driving away the dragon. Today the marvelous grotto world can be entered without risk.