Experience earth’s history: where mountains are upside down In the UNESCO World Heritage Tectonic Arena Sardona you can experience how mountains rise up close – and much more! How about a panoramic mountain hike through landscapes that tell a 300 million year old story? Or a site where fantastic fossils were found? The “magical line” of the Glarus thrust or the world-famous hole in the mountain through which the sun shines on certain days of the year? Take your pick – or discover everything at once.