The Engadin owes some of its fame to the combination of imposing mountain landscapes with its numerous lakes, rivers and streams. The lake plateau is particularly picturesque between Maloja and St. Moritz. This lake landscape will captivate you with its beauty, clear colours and mystical appearance.

In summer, the lakes are ideal for all water sports, while in winter, the thick layer of ice provides an additional area for walking, cross-country skiing, snowkiting or sporting events, such as "Polo on Snow", "White Turf" or the Engadin Ski Marathon.

The small swimming lakes glisten on a hill in the sun, lie in a sleepy, wide valley or are hidden in the forests. These clean mountain and moor lakes are tempting swimming spots on hot days. Particularly beautiful lakes: the Lägh da Cavloc near Maloja, the Lej Nair and the Lej Marsch in St. Moritz Bad. And many people consider the Lej da Staz between Pontresina and St. Moritz to be the most romantic lake.

The Flaz, a river in the Upper Engadin, meanders from Pontresina to Samedan. It starts where the Bernina and Roseg streams meet and flows into the Inn river at Samedan.
At the confluence, the Flaz has a significantly larger volume of water than the Inn. Hydrographically speaking, it is therefore the main stem of the Inn system and even – given the slightly higher volume of water on average in the Inn than in the Danube – that of the Danube system.

This approximately 14-km-long torrent with its tributaries drains the northern glaciers of the Bernina mountain range. First the Ova da Bernina flows through a wide area of scree before crossing a narrow gorge (Pontresina Ravine) near Pontresina. Shortly afterwards, it meets up with the Roseg stream and forms the Flaz, which flows into the Inn later on.

The Roseg stream gets its water from the glaciers of the Sella mountain range and the adjacent Lej da Vadret (glacier lake). It flows through the Roseg Valley and also flows into the Flaz at Pontresina.