Rigi rēˈgē [key], mountain, in the Alps, N central Switzerland, between the lakes of Lucerne, Zug, and Lauerz, rising to 5,908 ft (1,801 m) at the Kulm, the highest peak. Ascended by rack-and-pinion railways (built in the 1870s), it commands one of the most famous views in the world—a panorama of nearly 180 mi (290 km).

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