Lovers of Old Swiss style should consider the 8-km (5-mile) trek to the St. Beatus caves. Their legend goes back to the sixth century, when the missionary St. Beatus arrived on the Thunersee to find the local population terrorized by a dragon that lived in the lake and surrounding grottoes. Exorcised by Beatus, the fleeing dragon fell to his death on the rocks. Today you can see the stalagmites, stalactites, and pools inside, as well as a replica of Ponzo, the dragon,
for children to explore. Take a jacket, as it's cold inside the caves. You can reach the caves by taking Bus 21 from either train station or by crossing by boat from the Interlaken West station to Sundlaunen, then a 20-minute hike to the caves.