The Swiss Tectonic Arena Sardona presents an exceptional and dramatic display of mountain building through continental collision. Criterion (viii): Earth’s history, geological and geomorphic features and processes: The Swiss Tectonic Arena Sardona provides an exceptional display of mountain building tectonics and has been recognised as a key site for geological sciences since the 18th century. Its geological features can be readily appreciated by all visitors. IntegrityThe property contains the full range of tectonic features necessary to display the phenomenon of mountain building. Protection and management requirementsThe major exposures of the geological features are within protected areas and are substantially unthreatened.