Be amazed by the impressive Tectonic Arena Sardona, which was included in the UNESCO World Natural Heritage list in summer 2008. The reason for this fascinating sight are 250 years of old Verrucano rock, which was pushed onto flysch rock that is "only" 35 to 50 million years old. There is no other place in the world where traces of a mountain's origins is so clearly visible.

The panorama of Cassons is uniquely breath-taking. On a clear day over 500 peaks can be seen, from Ortler in the east to Monterosa. The new panoramic view with an info board about the Sardona world cultural heritage site, which describes how the geologically unique phenomenon came into existence.

The information board about Sardona and its geology can be found on the Cassonsgrat, approximately 50 m north of the flag.

The geological fact that younger stone lies on older stone can only insufficiently explain the magic of the Glarner Rift.

The jagged spikes of the Tschingelhörner can hardly be overlooked. Twice a year, however, the lower lying Martinsloch steals the show. In March and in October the sun shines for a short time through the 19 m big hole and onto the church spire of Elm. A unique experience.