Quaint alpine villages and great skiing entice travelers to the Grisons. The sparsely populated region of eastern Switzerland contains the source of the Rhine and Inn rivers, 140 square miles of glaciers and dense pine forests. Join the ski action at the resorts of St. Moritz, Davos and Arosa or stake a lofty claim with a visit to Juf, which boasts the highest altitude of any inhabited village in the Alps. In summer, take a hike through the Engadine Valley in the unspoiled beauty of Swiss National Park.