Question: Vilan is a mountain near the valley of the European river beginning in what Swiss canton?
Context: The Dent de Brenleire is a mountain of the Fribourg Alps, located south of Charmey in the Swiss canton of Fribourg.  It has an elevation of 2,353 metres above sea level and is amongst the highest summits in the canton of Fribourg, after the Vanil Noir, the Vanil de l'Ecri and the Pointe de Paray.  It is also the highest mountain entirely within the canton. The Cornwallis River is in Kings County, Nova Scotia, Canada.  It has a meander length of approximately 48 km through eastern Kings County, from its source on the North Mountain at Grafton to its mouth near Wolfville on the Minas Basin.  The lower portion of the river beginning at Kentville is tidal and there are extensive tidal marshes in the lower reaches.  In its upper watershed at Berwick, the river draws on the Caribou Bog while a longer branch continues to the official source, a stream on the North Mountain at Grafton. The Chasseral is a mountain of the Jura Mountains, overlooking Lake Biel in the Swiss canton of Bern.  With an elevation of 1,606 metres above sea level, the Chasseral is the highest summit in the canton of Bern outside the Alps.  It is also both the northernmost and easternmost mountain reaching over 1,500 metres in the Jura Mountains.  West of the summit is located the Chasseral Ouest (1,552 m), where runs the border with the canton of Neuchâtel.  The Chasseral Pass is located further on the west. The Rhine (Latin: "Rhenus" , Romansh: "Rein" , German: "Rhein" , French: "le Rhin" , Dutch: "Rijn" ) is a European river that begins in the Swiss canton of Graubünden in the southeastern Swiss Alps, forms part of the Swiss-Liechtenstein, Swiss-Austrian, Swiss-German and then the Franco-German border, then flows through the Rhineland and eventually empties into the North Sea in the Netherlands. The Scex Rouge (also spelled "Sex Rouge"; lit.  "red rock"; 2,971 m) is a mountain of the Alps, overlooking Les Diablerets in the canton of Vaud.  Along with the Oldenhorn to the east, it is one of the main peaks of the Diablerets, a huge ice-covered mountain near the western end of the Bernese Alps, straddling the border between the cantons of Vaud, Valais and Bern, and exceeding 3,000 metres above sea level.  On its west side, the Scex Rouge is part of a nearly 2,000 metre-high amphitheatre of cliffs surrounding the Creux de Champ valley, south of Les Diablerets.  On its southeast side, the Scex Rouge overlooks the Tsanfleuron Glacier, the largest in the massif.  Administratively, the mountain is part of the municipality of Ormont-Dessus, which also includes Les Diablerets. This is a list of mountains of the Swiss canton of Schwyz.  Schwyz is a very mountainous canton and lies almost entirely within the Alps.  It is also one of the 15 cantons having summits above 2,000 metres.  Topographically, the two most important summits of the canton are those of the Bös Fulen (most elevated) and the Rigi (most prominent and isolated).  All of the mountains of the canton are part of the Schwyzer Alps mountain range, although not all the mountains of that range lie within the canton. The Vilan is a mountain in the Rätikon range of the Alps, located north of Malans in the canton of Graubünden.  It lies south of the Falknis, between the main Rhine valley and the Taschinas valley. Roan Creek is a tributary of the Watauga River that rises near the border between the U.S. states of Tennessee and North Carolina.  Its source is located along the slopes of Snake Mountain near Trade in Johnson County, Tennessee.  From its source, Roan Creek flows north, then turns west around the northern end of Stone Mountain.  Then it flows south and west through Cherokee National Forest in the valley between Stone Mountain and Doe Mountain, until entering the Watauga River and Watauga Lake, the reservoir behind Watauga Dam.  Its waters eventually flow through the Watauga River, the Holston River, the Tennessee River, the Ohio River, and the Mississippi River to the Gulf of Mexico. Aarau (] , locally [ˈɑːræʊ]) is a town, a municipality, and the capital of the northern Swiss canton of Aargau.  The town is also the capital of the district of Aarau.  It is German-speaking and predominantly Protestant.  Aarau is situated on the Swiss plateau, in the valley of the Aare, on the river's right bank, and at the southern foot of the Jura Mountains, and is west of Zürich, and 65 km northeast of Bern.  The municipality borders directly on the canton of Solothurn to the west.  It is the second-largest town in Aargau after Wettingen.  At the beginning of 2010 Rohr became a suburb of Aarau. Morrisons Cove (also referred to as "Morrison Cove" or "Morrison's Cove"), is an eroded anticlinal valley in Blair and Bedford counties of central Pennsylvania, United States, extending from Evitts Mountain near New Enterprise, north to the Frankstown Branch Juniata River at Williamsburg.  The width of the valley varies from 10 to between Tussey Mountain on the east to the chain of Dunning, Loop and Lock Mountains on the west.  Almost entirely enclosed by these mountains, the only openings in the cove are at Loysburg Gap in the south, McKee Gap in the west, and at Williamsburg to the north.  The floor of the valley is mostly level, with many large fertile farm fields.  The southern end of the valley drains to the Raystown Branch Juniata River via Yellow Creek through Loysburg Gap, and the northern end drains to the Frankstown Branch, via Clover Creek.
Answer: Graubünden