High-altitude flowers from the Pyrenees, New Zealand, China, Nepal or Tibet also grow in Switzerland. In the botanical garden Alpinum Schatzalp, 3500 plant species and flower varieties from the world's high mountain regions bloom from June to September.
A calm lake lies near the Oberalp Pass. This lake's water flows clear and fresh into the valley. The Tomasee (Lake Toma) is considered to be the source of the Rhine. And it is only here that the river that flows through four countries can still be crossed with a single step.