The Müstair valley is one of Switzerland's most beautiful mountain valleys - and is home to the worldwide unique biosphere reserve in the Romansh language region.Life in the «Val Müstair» has always been at one with nature: this valley is only accessible via the Ofen Pass from the remainder of Switzerland. Everyday life here is accordingly quiet and secluded. It is characterised by traditional villagescapes, an inviting terrain and, thanks to the southern aspect of the valley, a pleasant, mild sunny climate.The river Rom flows through this idyll, from its source in Tschierv, right to the Italian border and beyond. The themed trail along its banks passes across escarpments and old meadows inhabited by elves and takes in the splendour of fen Alpine flowers.